I'm a straight crossdresser, occasionally wearing dresses is an important part of my life. I know I started cross-dressing as early as age three, because there are photos of me in a tutu, though memory of that is fuzzy at best. But it really started right around the cusp of puberty. Sometimes I would be home alone after school while my mother was at work, and I would try things of hers on and look in the mirror. I didn't have any body hair at that point, and I would imagine that I was looking at a girl. I don't know when I started actually seeing myself as that girl, but over time, that's what happened.
Now, when people see a man dressed as a woman, they make one of two assumptions (well, really they make one of three assumptions, but I don't feel like addressing the "AHHH! It's the depraved spawn of Satan! Kill it before it corrupts the children!" folks right now): that you're a trans woman or that it's some kind of kinky thing. There are plenty of crossdressers in both of those categories, but there are plenty more who are like me -- I'm perfectly comfortable in my male skin, but also have a distinctly feminine side of myself that I feel the need to express.
I finally decided t come out and in this new phase I am looking go out in my female avatar, need help with finding right clothes, need help with correct etiquette and most importantly encourage my inner woman to be herself.