I would like to work at a library, but I also recognize that the notion is like a childhood fantasy of mine, and it might get old fast. Essentially it is like customer service/retail kind of work, when I think about it.
I am a total procrastinator and would like to do freelance accounting/bookkeeping work, but I think I might have some annoyed clients if I wasn't able to resolve some of my procrastination tendencies. This is why i like to have a job and a boss and deadlines. Otherwise I would be much less productive. There are always MMM forum posts I haven't read or responded to yet, and they call my name all day long...
Working someplace for a discount would be nice! There aren't any close enough to me, but a ski resort would be fun. Or working for Amtrak or an airline for discount travel would be nice!
This isn't working for fun, but I'd also like to use some of my time in retirement to be more creative- write poetry, learn to play an instrument, maybe even combine them and write music. For my own amusement, of course. I describe my poetry as "stuff a 3rd grader would be proud of." And I've never really shown an aptitude for music, but, ya know, if I have all that time to practice, who knows what I might be able to do?!
That's what excited me most about retiring, time to try new things that are too easy to put off because of work. I'll just have to be careful not to procrastinate too much when retired...