For me, I identify as a crossdresser, just a crossdresser. On occasion, and in private, I like to dress in women's clothing. I dress in SECRET, I have one friend who knows in real life, and numerous friends who know in Second Life.
IT is a sexual fetish, that is, I do it because I enjoy it and because I will masturbate while dressed as a woman. I feel a little shame about this, but, 20 years later I can deal with it.
I am only interested in passing as a woman in so far as I'd like to dress correctly and appropriately for my age and size; which is mature and 6-2 @ 190 lbs ( a bit big for a girl ). I am not interested in dressing full time any more than I am interested in taking-on any of the specific clothing from my hobbies on a full time basis. (Garter and suspenders for hockey, spandex shorts for cycling, motor cycle boots as well?)
The private and secret part of this hobby is part of what attracts me to it, I really don't want to discuss it with most people on a regular or irregular basis.
Does that help? It helps me... I confess that I do like the online crossdressing community.. thanks for being cool.