The way I read the OP's question, this is not about whether or not you consider your self a crossdresser, we're all here, so we probably fill that bill.
This is rather about what level of dressing you consider being cross dressed.
I will always BE a crossdresser regardless of what I'm wearing, evening gown, garter and stockings, heels, full makeup, and wig, or naked just out of the shower.
A crossdresser is just who I am.
Now being cross-dressed, I'd have to agree with a few others, panties is all it takes and I wear them every day.