I go through phases. Every once in awhile, I won't watch porn outside of work for up to a month at a time.
Then sometimes, I'll watch it a few times a week.

I masturbate to still pictures sometimes, but in the still pictures, I prefer the girl to be really pretty and have eyes that draw me in to her. In video, overall personality and sexuality can win me over.

I prefer stuff that is sorta hard (Elegant and Evil Angel), but I can also get into a Wicked feature, as long as the dialogue isn't too over-the-top corny, as can be the case with lots of porn features.

My favorite type of porn is the vignette, where each scene has it's own little storyline, but they're individual, not just one part of a full plot.

I purposely seek out watching scenes that have girls that are sexually confident, but not necessarily dominant over the guy.