Well I've advertised a lot that I'm a yaoi fan, so I've seen quite a bit of stuff happening between drawn males, and even a few animations. Mainly it's just two males enagaged in sexual intercourse, but there's the occasional bondage theme, cross-dressing (which I actually don't like that much to be honest), and a bunch of other stuff.
I say that I like yuri, but I'm not into the pornographic aspect, just the romance.
In terms of hentai involving men and women, I've seen mini sample trailer thingies 'cause I was curious, but I don't watch heterosexual porn 'cause I don't need to
A lot of it is geared towards people who have an "appreciation" of the female body, so it's mostly things with beautiful girls or women with large breasts that are fondled and such and jiggle when having sex.
Weirdest things I've seen would be some form of space monster with tentacles and forcing themselves on some busty school girl.
I remember there was trailer thing that had a vaccuum which made me think WTF...well actually, no
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