I'm another who would keep on working if I won the lottery. It not that I have no imagination, I just honestly like what I do. I like the people I work with (they also happen to be friends), I like the work (most of the time) and I would be doing something similar at home as a hobby if I wasn't doing it professionally. Though doing stuff at home by yourself when you could be working with other like-minded people is not nearly as fun.
That said, I'd definitely have more exciting weekends and holidays :)
If you ever find work that you love doing then I would think you'd change your mind about the whole having no imagination thing.