I went from a 5'9" 8th grader to a 6'4" sophomore, ended up at 6'6" which is about the maximum before life becomes really difficult.
My inseam is 36, which is as long as they get at gap.com, haven't bought a pair of pants in a store in at least 10 years. Flights can suck but I've always managed to squeeze in, sometimes barely.
Best part of being tall, you put on few lbs. and nobody notices.
Worst part you put on a bunch of lbs. and scare small children.