My friends and I argue about "eternity is hell" all the time - how even a christian heaven would actually be hell since it's never ending. However for me, I could easily create a 20 or 30 year cycle of activities that would eternally satisfy me. It's a little silly but for example I'm starting to hanker for some old TV shows I watched 20 years ago. The argument typically goes that in eternity, you'd run out of things to do, but I just don't see how that's possible, I do things I've done before and enjoy it the second, third, fourth time around, so there's no such thing for me as "running out of things to do."