I don't want to give the wrong impression; I wouldn't say I'm habituated, because I still think about T a lot, and it drives me f***!! crazy a lot of the time.
That said, my sleep has been normal for the past couple years, at least -- and, the big obstacle to that happening, was that I took benzos and other crap for a long time, and getting off the pills made the insomnia really bad. I took benzos for many years, and I was severely dependent.
It's weird; I suppose I'm 'lucky' in that given how much my T often bothers me during the day, I am able to sleep with it just fine, and even 'enjoy' laying in my bed in the dark in as close to perfect silence as I can pull off. What I really like are very quiet natural sounds -- wind, crickets, etc -- but I don't like recordings of those same sounds nearly as much, and it can be hard to find those sounds in the city. I'll move out into the country eventually, but it's taking some effort to get that all lined up.