There's now a website called LoL Parse which reads your league logs through chrome or firefox, giving you details of all the champs you've ever played and who you played with etc
Give it a go http://www.lolparse.com/
And post your stats here... if you want to share.
I was quite surprised by some of my stats. Like how Teemo is in my top 10 champions played even though I haven't played him since levelling.
That feels like way too many minutes playing league in a single year...