The worst things I did were:
1. I didn't finish my degree. Although I don't really regret it that much.
2. I didn't pursue the idea of breaking up the relationship of my crush and her GF. They didn't last. SAYANG! She's still hot even if it's over a decade now since I left college.
3. I went skinny dipping in one of the campus swimming pools. Got caught. Went to jail for trespassing.
4. Got caught for drinking in the school premises. Had to apologize to one of the deans.
5. Was lazy.