Good to see you guys from our ole times. For me, what america gave:

Independence or self-sufficiency, maturity, ability to see things from other perspectives, ability to hardwork, courage to face difficulties ( I am not afraid anymore, bring it on), money (of course), advanced degree, ability to accept differences in us, made liberal,

What it took away:

As someone already pointed out-social life, true/ good friends, youth,

I am also thinking of going back in a few years' time. Have responsibilities towards parent, they are getting old.