I wouldn't go and say it was a waste of time. You were an experience. A damn decent one at that. The cynicism and self-loathing that came after was sure to happen at some point in life. I just wish there was more time, and yeah, you gave me fair warning. I didn't listen. I guess i'm just stubborn in that way.
But given the chance. I'd do it all over, not exactly the same, but close to it and with more flair.