First, I recommend getting a wig - and a dress, and nylons, and heels - go for it!
I wanted to taste my own cum for years - since I started jerking off, really. When I finally got up the courage to actually lick the cum off my hand, it wasn't bad at all.
No nasty taste, just slick on my lips and tongue. And I liked it! Since then, I've managed to cum in my own mouth, and got off on knowing I was doing it.
Being a crossdresser myself, that's what convinced me that I had to suck a cock. Once I had tasted my own cum and knew that it wasn't nasty, there was nothing stopping me from getting it on with another tranny. And sex just doesn't get hotter than nasty tranny sex.
Take a look at the crossdresser on Flickr - it's a real inspiration how hot some trannies are.