I come from a place that college degrees are frowned upon. My HS was a waste of time, nobody prepared us for college, most people never leave far from home, etc.
I think college is worth it. The title of this thread is misleading, the title has the word "always" in it. College is not always worth it. I know several people who aren't smart enough to make it in college. They will stay close to where they grew up, make about the same money their parents make, etc. In their case (which I find sad) then college would not be worth it.
However, in going to college and then seeing the behavior and thought processes of people that live where I grew up, it is like night and day. I'm not going to say that everyone should go to college, but I think everyone should be smart enough and have the right mindset to go to college.
Needless to say, not all colleges are equal.