At this point in my transition (T, top op, no bottom op, and satisfied with that) no part of my body is off limits for partners. I'm gay and a total bottom, so penetration is something I definitely like. In both holes. I'm fine with being given oral as well.
My post-op nipples are not sensate, but it doesn't bother me if/when a partner gives attention to them, but I can't feel it when they do.
The only limit I have, in terms of me being trans, is don't call me a girl, she, woman, etc. Exception only granted if it's a genuine mistake.
I used to have more limits before though, cause of dysphoria, physical issues like vag atrophy and just general mental hang-ups. My vag was off limits for ten years before I suddenly started enjoying it again, and treated the atrophy. Before top surgery my chest was strictly off limits, but I was fine with showing it during sex.
Not related to me being trans is I have limits for some certain kinks that I'm not into, and that I'd never dom, cause I'm a total sub.
I've had boyfriends in the past, and was very sexual with them during those relationships. But I'm single now and not looking for a new relationship, so it's hookups for now. I have a high sex drive (thanks T) and am a very sexual person.
For hookups I actually don't mind ->-bleeped-<-s, cause I like being objectified and seen as kind of "exotic" for the way my body is/looks, and I like using my transness to my advantage. So if you have any annoying ->-bleeped-<-s you can't get rid of, send them my way!