Discuss in here the things, if any, that you used to love/like/enjoy but now no longer care for.

For me, I used to enjoy 3D Modeling (was getting As and Bs in classes), but in our final modeling class that just ended, I had a complete and utter apathy for modeling, resulting in a D. I just couldn't find the desire, motivation or happiness I used to have for it.

Wrestling. Somewhere, somehow, I was no longer in 3rd grade and my love for it died out. I just lost all my interest.

Pff, I was going to post something, but you know... just can't be bothered.

Football (soccer). I still like it, but I'm nowhere as into it as I was earlier.

KFC, I used to love but now it's just been not as tasty.

Garry's Mod.

I used to get first page with the content I put out. After a while though, I noticed the community taking a turn that I wasn't interested in. So I got out. The best servers are gone now and all the veterans are long forgotten or not cared for. It's like they faded from memory. Yet people still play their maps. Or use their mods. Sad.

Also Valve Source Modding.

Like making hl2 modifications. That was fun. Like an intro to game design. However, after dealing with so many people that claimed to be skilled, but turned out to be charlatans.

Well, at the moment ... playing video games. (I'm sure that one will come back, tho, heh)
I find myself growing less and less enthusiastic and bored with about 98.6% of all movies and books, even in the genres I used to love. It's not quite apathy yet, but it's rapidly getting there.

If we're talking more active hobbies, I used to enjoy long random drives. Where you get in a car and just go, picking random places to stop and get a soda/snack and keep on going. But now if I don't have a reason/purpose to getting in the car, I can't be bothered. eg, I don't like driving anymore (as a fun thing).