While I'd love to say, "hey, I don't do anything I don't want to!" in a professional capacity, it's just not feasible in my line of work. I work in technology, and nothing gets done without teamwork... lots and lots of teamwork. I've worked at large companies and small, and ran my own start-up for 6+ years (until selling it)... but the story is always the same - there are just things that won't be pleasant, but they're required. It could be a client that just becomes a real pain, but "firing" a client comes with real world ramifications. It could be a senior executive at a big corporation... or just a project that's lame, even if nestled amongst an otherwise fantastic set of work. In my experience, there's no such thing as a "perfect" work life. I think I have it VERY good, though - an interesting, exciting field of work, lots of smart people, interesting challenges, working from home - in the large scheme of things, I would never complain.
BUT, there are other things I want to do with my time. If I wake up, it's exceptionally sunny, and feel like just taking a day trip to the beach... well, I want that freedom. If I wake up and decide I'd like to build a new little start-up that will require my attention non-stop for the next year, well I'd like that freedom, too. Said another way, working for income is restrictive... and I'd like to "free" myself from that situation while I'm still young enough to enjoy all of the other alternatives.
As I said, I'm in good shape now. If I worked another 20 years, I'd theoretically reach the point where the money would go to waste unless I started living a very lavish lifestyle - which, I'm SURE I could accommodate, but I just question whether the trade-off of TIME would have been worth it. Time is the one thing you can't buy... and you can't rewind the clock on your health... so, for me, it seems like a big gamble to keep spending SO much time fixated on work if the only reward is amassing wealth that's far beyond what I'd need to be more than comfortable. Difficult choices.