Well, after spending 7 years in a British school, I picked up a British accent. It's an equal mix between posh English and cockney.
But now, since everyone that speak English around me have an American/Israeli accent, my own accent is americanifying (is that a word?

). I'm completely immune to the Israeli accent for some strange reason. I live in Israel, so...

My accent right now is Posh/American/Cockney... That looks terrible, but I assure you that I'm very understandable...