I'm in an office pool that mostly just does our state lottery but throws money at MegaMillions as well when it gets really high. I figure I can spare a couple of bucks a week on the very, very, very, very off chance that we win something.
I find it kind of sad, though, that some of the people involved seem to be pinning desperate hopes on winning. I mean, a lot of money would be nice, but I'm not really disappointed when we don't win. Tbh I don't even really fantasize about what I'd do if I won, except that I'd like to do some traveling, donate money to my temple, and set myself up for excellent end-of-life care. MegaMillions is probably overkill.