IMHO, we learn to like alone time because we are different from most people and we learn to fully express ourselves while alone. If we all had numerous crossdressing friends throughout or life, I don't think the alone-time trait would be that common.
As for XDR versus CD: Some crossdresser sites have target advertising and things like "CD Player" come up. It's impossible to avoid multiple meanings for abbreviations, but CD is a bit too common. If you really want something different, why not just CDR?
Some people dislike GG and use "RG = Real Girl" instead, because some people use GG as a term for a horse. (I don't know how GG translates to horse.)
