I've never gotten achievements at all. I had a brief achievement phase when TF2 gave you items for getting achievements, but as soon as that was over I never looked at the damn things again, anywhere, ever.
That said, I play way too much. Achievements may not do anything for me, but I absolutely HAVE HAVE HAVE to get my hands on new toys and tinker and customise and experiment and have fun with them. Combining different Mutations/Weapons in Nuclear throne, kitting out a team of mercs in Jagged Alliance, building ships in Gimbal, or tweaking gear in Warframe...that kind of stuff makes me spend dozens, if not hundreds of hours on games.
But I never notice until another exam is two days away and I have to peel myself away from the games in a moment of "What, I'm supposed to ACTUALLY get to work now?".