I hate love triangles where two guys fall for one girl. I guess these days almost every book and movie has this kind of love triangle. But I like mmm and fmf love triangles.

If done well it can be really good, i like the one in "midori no hibi" for example.

However i'm more a fan of circles and pentagrams then triangles, where everyone love someone just not the one that likes them, hatsukoi limited hit home pretty well for me.

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Reads far to much Manga

I can't really vote in the poll since my opinion on love triangles changes greatly depending on the genre of the manga. There's a huge difference between love triangles in a comedy manga and love triangles in drama manga. In one it's used as a comedic device and in the other it's something that causes drama and angst. I think "it depends on the genre of the manga in question" would be my answer, but since such option doesn't exist I'm unable to vote, sadly.