I'm currently obsessed in mangas that shows how a person live with his chosen profession.
Something like this maybe....
Kounodori
Sommelière

i also don't mind if the protagonist are still students like in this mangas:
Gin no Saji
Doubutsu no Oisha-san

Thanks in advance!!!! 😀 😀 😀 😀

"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein

what comes to mind first would be Hikaru no Go and Baby Steps also prety much anything by ADACHI Mitsuru

stupid photobucket, wanting $400/yr just to display your images

Tales of a Charcoal Burner
Little Forest

Does the protagonist have to be hard-working and/or successful at his profession? If not, try A Worthless Person.

You might also want to check out stuff in the Biography/Autobiography tag.

For example, series such as Doing Time, A Drifting Life, and Disappearance Diary might interest you.

If fictional (fantasy/futuristic sci-fi) jobs are ok, I recommend Saturn Apartments and Noramimi.

All of your suggestions seems to be interesting and they are exactly what I'm looking for...
Thanks!!!! I'll start reading some of them... 😀 😀 😀 😀

"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein

If you like Sommelier, maybe Bartender or Kami no Shizuku.
In lieu of Gin no Saji, Moyashimon?

Health: A lot of doctors, realistic and unrealistic ones: Wild Life (veterinarian), Dr. Koto Shinryoujo, Dr. Frost (psychologist), Team Medical Dragon, Saijou no Meii. I like Nurse Aoi but it's not available online.
Music: Nodame Cantabile (pianist/conductor)
Interesting profession: Nanatsuya Shinobu no Housekibako (Gems Appraiser, basically NINOMIYA Tomoko's manga have interesting topics), C.M.B. (museum curator?), Ghost Hunt (ghosthunter), Tokkyuu (lifeguard), Real Clothes (saleswoman), Uchuu Kyoudai (astronaut), Planetes (futuristic space janitor), Aria(Martian gondolier), One Outs (gambler? baseball?)

There are a lot of manga on showbiz (including singer, dancer, actor/actress, dubber, mangaka), sports, detective, cooking (I still recommend Yakitate!! Japan though), period-based profession (like shinsengumi) or school clubs, so I omit those. They are more common, but there are a lot of interesting clubs, including uncommon sports. If you're interested, maybe I'll recommend some.

I think I've read manga in a lot more topics, let me re-add some later.

The only one I remember at the moment is Itohen. It's about tailoring. 😀

Wow... Thanks for the suggestion guys!!!! 😀 😀 😀 😀

"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein