I'm signing up for the Trip Down Memory Lane level, which means I need to reread 12 books this year. That sounds like a lot, but I've already got a couple down. And this summer, I'm planning to reread the entire Harry Potter series (which, yes, I've already done several times, but it's been awhile). That's seven books right there. So twelve altogether should be doable.
How about you? Do you reread books? Do you guilty when you do so, like I do?