I watch anime because I like the Japanese language, there's a lot of anime readily available online, and there's some genuinely awesome stuff out there.
Sadly, my taste in anime is pretty limited. I'm a bit of an intellectual snob, so if the anime doesn't have a point beyond sweet-looking fight scenes (ahem, Bleach, One Piece, Gundam) it's not for me. I don't do fan service either. I think Tim Maughan of http://timmaughanbooks.com/category/reviews/ explained it best: "Watching barely teenage schoolgirls wearing skimpy clothes being soaked in the rain does nothing for me. In fact, it makes me feel pretty damn uncomfortable and party to exploitation." Those two rule out a whole lot of shounen, and my aversion to unrealistic romance wipes out a lot of shoujo too. Although I will freely admit that sometimes love-triangle dramas are hilarious. Just not in the way they were intended to be.
However, there's some really intelligent, cool stuff out there, like Planetes, Cowboy Bebop, Xam'd: Lost Memories and etc. And that stuff I really love. I'm looking to find more like them.