It really depends... on a lot of factors.

But most of the time, if I like it, I try it and see.

i probably wont watch it at all
i never enjoy reading stories or watching movies if i know what's going to happen

It won't be a high priority, but I'd watch it weekly.

Depends on the quality of the adaptation and how much I liked the manga, but for the most parts, I would say no. It takes a lot less time to read than to watch

I rarely watch anime these days so it's highly unlikely that I'd watch it. However, if I really like this particular manga I might try watching the anime adaption once it's complete.

I'd watch it when it comes out and follow on from there weekly. Might not be as good as the manga, but I'll still give it a shot.

I rarely watch anime that I had already read as manga, so I probably won't watch it at all.

Depends mostly on whether or not I liked the manga. And partly upon how long ago I read the manga (if it's 3 or 4 years, I might not remember all the details, so it'll feel fresher).

I'd probably watch the first episode or ask someone else about it, see if it's any good.
If it is, I'd probably watch it weekly.

Won't watch it at all.
If the manga from anime I've watched, maybe I'll read it. MAYBE.
But if anime from manga I've read, nope.
Humm but there are exception, like Hotarubi no Mori e. Since it's just a movie, I could push myself for watching it. But if series is no, no.

This rarely happens for me since most of the series that get an anime are ones with seductively dressed magical girls, romance, mecha, school life (usually middle school or first year of high school ), and late-night ecchi shows filled with fan service (90% of these Japanese girls having huge tits ). It's like every anime is written for lonely people who have their dicks in their hand the entire episode (using their tears as lube ). So much sexual tension and angst and cliches that have been beaten to death so bad that ero-guro fans could fap to it.
One recent rare exception is Mirai Nikki, but I've yet to watch any episodes as I feel the anime would ruin what I did like about the series. Many of the times I watch an anime based from a manga I've already finished it's never as good as the manga. Sometimes, they completely ruin the series altogether. Every now and then you find an anime that does great justice for it's manga, but just very, very rarely. I also prefer when they don't deviate from the original plot and have little to no filler. I'd rather have the anime condensed than expanded with a bunch of extra crap that doesn't advance the plot. Something like covering 2-3 chapters per episode instead of 1 chapter per episode like One Piece seemingly does. Filler champ would be Naruto. Should haven ended a long time ago and is now ruined goes to Bleach. The manga that is just one big filler with a plot sprinkled in is tied with Beelzebub and Sora no Otoshimono. And finally, the manga that everyone can predict what will happen next is Cage of Eden. There are others, but those are all pretty much the most well known.
This is more about the last poll, but manga and anime series keep getting worse. It's all about fan service and hybridized, generic, poorly recycled, unaltered (except maybe a 10% change in circumstances) cliches. Like I said before, unrealistic romances, scantily-clad little girls (and sometimes cross-dressing boys), harems with one of every type of girl (tsundere girl, female childhood friend, shy girl, flat-chested girl, big tits girl, glasses (maybe loner as well) girl, rich girl, school idol, sadist and/or masochist girl, student council president, socially awkward girl, but usually there are combinations of 2 or more of those qualities and bang, you have a harem), and girls who do most of the fighting so their clothes get torn off. I'd rather not see a girl with the body of a 10-year-old flashing panties and a lot of skin. Hell, I'd rather not watch any hentai or borderline hentai since most is geared to weird fetishes like piss and shit, incest, pedophilia, incest pedophilia, rape, "gender bender," and massive tits that defy gravity. I'd rather go get laid in real life or fap to real porn

tl;dr
Anime is mostly fan service for kids, pedophiles and sexual deviants who enjoy unrealistic "slice of life" and romance and school life (also painfully unrealistic; perhaps viewed to forget their own painful experiences?). Fillers and plot deviations are all too frequent. Anime ruins the original manga 90% of the time with the same generic, lightly modified (if that) plots and story lines. I'd rather wait a week or two longer for better quality episodes. All my personal opinion.

that3rdguy is the reason why internet sucks these days


...
if i like the manga/light novel/visual novel
if i like the voice actors
of course i will watch it

I'd watch the anime as it comes out if I really like that manga and I'd like to see it animated.
If its a romance anime I'd probably watch it when I feel like it. Romance manga are generally quite slow paced animes. (I think from the animes that I've seen ). If an anime depicts the manga as fan service, fillers and no continuation of the plot I wouldn't watch it.

This pool lacked the options I would have voted for. Depends on how much I liked the manga. Any manga I loved I would watch the anime weekly for. If they made a series of Yokohama Kaidashi Kikou I would watch it weekly (didn't really like the OVAs). While something like Evangel I doubt I would ever watch.

Mostly I don't watch series weekly though so I ended up voting for when the series is over, the normal way to watch for me.

If I see a new anime adaption of a manga I have read before coming out, usually I will watch an episode or two. After that...drop. If I get behind, then I will stay behind. This is out of personal preference though--I usually don't like to rewatch/read things. Anime typically just seems to be a rehash of what I have already read or not as detailed as I had imagined. It's the same with movie/book adaptions.

Though I do not like much filler material in animes, I will also say that they can be beneficial for fleshing out characters or making the anime into a different beast from the manga.
Example: Hunter x Hunter
I know many people enjoy the 2011 remake which follows the manga very closely. It may have some censored bits and but other than that it follows the manga almost panel by panel. However, it doesn't feel like the Hunter x Hunter I've come to love...the original anime. The fillers gave characters greater dimension in the old anime compared to the new one. 2011 remake characters just fall flat to me. What drives Gon's motivation to find his father? Should I really care about all these other characters like I did in the original? Filler episode arc in the hunter exam brought out some of the minor characters that are completely forgettable in the 2011 version.
Kurapika's fight with Hisoka, a couple of panels in the manga, was drawn out for a whole episode in the original. However, it was an important fight to introduce an upcoming arc...a fight that was glossed over (and forgettable) in the 2011 anime and the manga.

I will have to say that I love the Mushishi anime adaption. It has the music, animation, color, and the acting that brings the manga to life.

I don't watch any anime anymore so ... fast choice!

Rarely. I usually only watch anime that wasn't originally a manga. Things based on Light Novels or just straight up originally anime.

Though I am watching Chihayafuru and the new Hunter X Hunter so what do I know.