I used to write fanfiction around my tweenage years. In those days, I was usually plugging for Dragon Ball Z, but I also had a somewhat paradoxical desire to write about Sailor Moon as well, resulting in a permanent crossover fixation. (I felt the need to point out that one would easily annihilate the other, which tends to be ignored even today)
At the present, I have walked into an anime epiphany that began with Cowboy Bebop. My favorite recent find is Black Lagoon; as one might infer, I'm quite interested in action in general. But the general disrespect for all things military in that genre is one of the more irritating things I've seen.