Hmmmm. This is a tough one.
Everything that I think of seems like it would get old after awhile. I know that if it were Ben posting this, he would definitely say golf. Lame.
I really don't know. Drinking Diet Dr. Pepper, perhaps? Reading?
Wait, how about this one: Eating junk food.
I have prayed countless times that I would no longer have a taste for junk food, but it's been 26 years and I still love it. So that's what I'm going with: I'll never get tired of shoveling junk into my body.