Used to be decent at League of Legends. I was in the top 500 closed beta testers, if that means anything. I mean there could have been only 700 hundred active players in the whole beta for all I knew, haha. I played regularly with a few of the top 100, does that mean anything? Once, matchmaking put me up against Reginald (Andy Dinh, Team Solo Mid now I think?) and TakashiX etc. Matchmaking was wrong, I wasn't anywhere near that good. Got flattened by Regi's Anivia mid.
http://na.leagueoflegends.com/board/showthread.php?t=20721 (fuzzy logic 1784)
Nowadays, I'm pretty bad, like a 1100-1300ish player.
Won a 2v2 Smash Bros. Melee tourney in middle school, won $20. Played Mario, partner was Link. Forget the other team's comp... maybe Fox and Ness? This was before wave dashing was discovered. Herp.
Got 7th place in some Donkey Kong Country time trial competition hosted by Blockbuster. I was like 8, and beat a bunch of 16-24 year olds. Won a pack of X-Men trading cards. Derp.
Real answer: Probably none, ever.