I'm taking 18 right now (54 using our system), but one of the psych classes I'm taking sucks... it's more like "how do feel about how we think the brain works" (a.k.a. bull$hit), instead of "this is what we know about how the brain works". If I don't drop it, then I take a normal load next semester, I'll probably graduate a year early. Dropping it would put me at 15 (45 using our system).
edit: I wanted to take more than 18 initially but my that requires special permission, which for some reason I did not get. Had I taken an extra course, dropping this one now wouldn't be a big deal at all.