Haha achievements are a curse, when I first got my 360 I didnt care about them, now days its like a mission to get achievements in games, I dont rent games just to get them...but I do my best to improve my score...
As you can see I don't have much compared to other people on this site, but ill get there one day...one day...

I have around 20 games, and I've had my 360 since launch day, but my score has yet to go over 10k. Really, they were cool at first, but I only go for them if there's one that either is really easy or sounds like a fun challenge.

I like them a lot. I wasn't as into them as much as when I joined the Gamerscore league here. It really adds mileage to the games you own and is overall pretty addicting.

I find myself buying x360 games over pc games for 2 reasons:

Achievements, and PC req. fear.

I do find them fun.

I enjoy receiving Achievements but I don't think I've ever gone out of my way to get them. I certainly wouldn't buy games I otherwise wouldn't want for example. But it's always a pleasant surprise when one pops up on screen.

I love getting achievements.
But I do suck at getting them.

some points are really hard to get.
so I don't play games to get scores, but love seeing scores go up.