I pretty much look as I do now. With only a few tweaks. Firstly as a teenager I had no concept of styling my hair. It would lie flat upon my head in every direction. No partings, no style whatsoever. It wasn't til college I started crafting my trademark quiff.
Secondly, I was in my twenties before I needed glasses. Something I took great pride in. Course now I take great pride in my glasses and continue to wonder when I can buy my next pair.
Finally I just looked alot fresher as a teenager. I didn't drink. I didn't stay up late. I generally took alot better care of myself than I do now. Now I just look tired and beaten all the time. Far too many late nights have been had by this man.