I think that pretty much all 'simple' cross dressers ( don't know about 'future transition' people, it may be different for them) have had times in their lives when they say "Why do I do this? I'm never going to do it again" and get rid of everything, clothes, make-up, etc. Then after a period of time it creeps back in again.

I certainly had at least 2 or 3 of those events, plus other periods of several years at a time when the CD need just evaporated for no obvious reason at that time.
When I found PM, I experienced the on-off in much shorter bursts, depending on how much PM I was taking, and I've settled on an average 2 or 3x 500mg capsules per day and that keeps me at a stable level whereby it doesn't much bother me either way and I can switch between modes quite happily during the day, if circumstances dictate.
Now, something I've only seen mentioned on here in passing once, ages ago, which may be relevant:
As I said, I've had periods of several years when I simply wasn't interested in CD, before it suddenly came back and bit me hard, and I couldn't work out why. It's only been with the benefit of getting older and the cumulative experiences of a lifetime that I have been able to make sense of this pattern. In hindsight, the non-CD times have corresponded exactly with me having a wife/partner who enjoyed wearing the clothes, make-up, etc, that I would choose for myself, and when either that relationship ended or circumstances dictated that she became less flambouyant, then I had the need to do it for myself again. In other words my female brain half just needed an outlet to express herself and it doesn't matter who that is!
Dunno if that makes any sense to anyone?