I have three that I use fairly regularly (a personal one, a school one, and a work one), and several others that I use occasionally. I have a spam one that I use for survey-related sites, a gaming one (that I don't think I've actually used for that much gaming stuff, but oh well), a couple of other random gmail addresses for various things, and two AOL accounts, one that was my main one in late middle school through high school and one that was my original email address from elementary school.
At this point, the school one forwards to the personal one, and I rarely check the work one outside of work, so I only have one account that I keep up and check all the time.