There is actually exceptionally few anime that I can stand, let alone claim to be a fan of. A few of the things I have enjoyed have already been mentioned, but I feel I should just say what I've enjoyed anyway.

Most anything by Studio Ghibli has proven to be incredibly interesting.

Cowboy Bebop is astounding, and the older I get, the more it resonates with me.

I haven't finished Wolf's Rain, but what I saw was very good. I'll probably be picking up the boxset soon.

I adore Hellsing (13 episode series, not the horrid Ultimate).