I *want* to like porn. But I'm not a big fan. Guy porn kind of freaks me out - I told my brother once (he'd jokingly asked if I'd include porn in care packages), that I would judge a man on the quality of his porn. A lot of it, to me, is weird or degrading towards women. It's why I can't walk into an adult store to search for porn. I end up completely turned off and unable to even think about sex. X(
The mainstream 'couples' porn has some of the same pitfalls of regular 'guy' porn. I'm just not a fan of overly large, augmented breasts swinging around in their unfluid-like way during sex. I end up distracted. Or breasts not moving at all. It's an aesthetic issue. And to date, I've only seen one porn star who *really* moved me. Jean Val Jean. Nice face, nice body, not over-the-top with muscles, etc.
Then there's chick porn. Candida Royalle has some fairly interesting movies, but I often end up with the same aesthetic issue. Looking normal is fine (Rebecca Love is a good example of a normal looking gal, though maybe a bit prettier), but that's rarely the case. Girls are either *very* good looking with a lot of work (make-up, plastic surgery, perfect body, whatever), or not good looking at all. Playgirl, imo, has to be the most boring porn ever. >_<
The best visual stimulation I've gotten came from certain Zalman King productions and a tv series from years ago called Bliss. That first ep of Bliss still sends my temp through the roof. Maybe I need believable erotic dialogue?
I admit, though, that I haven't tried lesbian porn. No reason, just never had a good recommendation for any.