This is the kind of post that usually attracts a LOT of replies, many of them quite good. But knowing that you're about to have a lot of reading to do, I'm going to try to keep this very short.

You alone are responsible for your career advancement. Don't expect a company to lay out a fulfilling career path for you. If you are unsatisfied, ask for more. If you can't get it at your current job, get a new one.

Dropping college won't automatically make you a bum, but finishing college will give you a way to prove to people that you aren't one.

Finally, some valuable reading:

http://www.paulgraham.com/wealth.html (Just don't assume that you have to be in a startup for it to work.)

http://www.kalzumeus.com/2011/10/28/dont-call-yourself-a-pro...

And the Derek Siver's piece mentioned elsewhere: http://sivers.org/kimo