I'm 5'6", and while it bothered me prior to going on T, I don't even think about it anymore. I suppose it used to bug me more when I was married, because my ex-wife was 6'1", but I've seen plenty of guys who are my height or shorter. The only time I really think about it anymore is when I'm around my little brother... he's 7 years younger than me, and 6'5". I got screwed on height. However, my dad is 5'9", my mom 5'7", and my older brother is only 5'7". So perhaps I'm not that bad off, after all.
As for growing once on T, I've never heard of anyone over 22 experiencing that. I started T at 25 and saw everything but my height increase.
SD