In University, I needed one more CS elective course, and the ONLY class available that fit my schedule was SQL. I had no interest in SQL, wanted nothing to do with it, and only took the class under duress. Even to the point of admitting as much to the prof in a casual conversation (he was a good guy, easy to talk to).

Within two months into my first job out of school, I was assigned to implement a SQL parser as a modern new interface for an ancient proprietary database. Every job since, I've written tons of SQL queries. SQL rocks.

Life is funny that way.