I guess my point is that if you're going to put hours and hours of dedication into something, then perhaps it should be something more useful like playing the piano or speaking Italian.
THAT SAID... I can name all the British monarchs in order since 1047, complete a Rubick's cube in 5 minutes and name and locate all 50 US states and State Capitals. All completely useless talents, the idea for which came from here: https://www.youtube.com/watch?v=Y-9fEeIh_NQ
Edit: Demetri Martin's worth a watch by the way.