I can't really think of anything I don't want, other than the increased risk to some medical issues, but even then it'll just put me on par with cis males, so what will be will be w what should of been.
Body hair, hairline, muscle, body fat distribution, facial hair, voice, general masculinisation, less of an ability to cry, no more sharks... All of it. It was reading about the effects of T and wanting all of them that made me research trans men and then everything clicked into place.
For a while lower growth was a big no for me, but after a while I warmed up to it, and want it now. I think it was just the shock of knowing my body could be changed so obviously and quickly in that department. And that its not 100% here nor there.