i've only had mine 5 months but i do play a lot and am called a achievement ***** at work...
Achievements are pure genius. I find I play games a lot more just to get them.
A couple of lads at work have cleared 20k now.
People are now putting their gamertags on their CV when applying for job here. I've got mine in my email sig as have a few others here.
When I'm playing games on the Wii or PS3 I'm thinking "I wish this got my achievments" sad I know.