My favorite is amateur too. I like watching real people doing naughty things becuase they want to, rather than professionals doing it to get paid. Overall though I like all categories listed above (except she-male and gay--never seen those). It just depends what kind of mood I'm in.

__________________
"Yes I did go to him,
but completely against my will,
and yes he did things to me,
things of which I dream of still,"

-Cowboy Junkies "Black-eyed Man"