The other DrC and I saw the animated Monsters vs. Aliens last night in 3-D. We were celebrating her birthday. It is a fun movie. Not a great movie, but definitely fun.
It did the usual PC Hollywood thing: empowerment of women and demonstrating that being different is no barrier to being a "good guy." This was done in a fun way so that it didn't become tiresome, as it so often does. They even let the military character become a more-or-less good guy too, darned generous for Hollywood.
One interesting oddity I noticed. The M vs. A alien villain strongly resembled the villain chef in the animated film Ratatouille. I wonder if there are only a limited number of configurations for villains or if the same guy drew them?