Lots of insightful replies here; love all the honesty. For me this topic reminds me of experiences some of my gay friends have had. When closeted, they felt like they were doing something "wrong", and they would perhaps fall into the trap of using the word "addiction'. Once coming out, all of that stuff fell away.
So, from a semantic perspective, perhaps the word "addiction" (and many of the models based upon the word) is too tied with something that is inherently negative or wrong. For me, once I fully embraced that I enjoy wearing women's clothing, all of those words and feelings of shame fell away.
At this point, I view clothes as being clothes. We wouldn't say that a man was "addicted" to wearing "guy clothes". The gender duality in regard to clothing is a social norm. I have owned women's jockey panties that were exactly the same as male jockey underwear in actuality, but of course they came in a different package that had a picture of a woman on the front.