I don't think you can generalize crossdressers any easier than the general population. Everyone does it for a different reason, and some of us are hetero, some of are homo, and some are in between.
For myself, I don't have an interest in being sexual with a crossdresser, or a man. I just do it for a release, when I don't want to be the male "me" anymore (hence my profile name). I would love to be close friends however with a crossdresser, as it's such a strange situation to be in that it would be fun to have someone non-judgemental to talk to. I think crossdressers are better people because we understand our postition, and know how it would feel to be ostricized, so we often keep our judgemental attitudes to ourselves. I think we would be very trustworthy friends who could keep secrets very well.
Hugs,
Staci