This one was hard to rate. Men in Black 3 has problems, and is by no means a great movie, but I couldn't call it "meh" after enjoying it as much as I did. It has the same kind of charm that the first Men in Black did even if it's not as good. Also, the 3D is actually pretty good for a post-conversion. I still didn't think it was worth the $18 ticket, but if you're really into 3D movies, this one has some nice effects.
This is just one cat's opinion. If you end up seeing Men in Black 3 this weekend, tell us what you think.