I love watching guys sucking shemales and shemales sucking guys, lots of ball licking too; 69 is another good thing; mutual masturbation and cock to cock stuff, and of course fucking - male to shemale is my preference.
I really love watching a t-girl ride a guy, sort of reverse cowgirl, so her cock swings around - that is sooo hot!!
Sexy lingerie, really girly/fem clothes, and pantyhose go a long way too...