It seems that the animation villains got all soft by the end of 2010. This one, a blue light-bulb-headed alien, doesn't really know which path is the one to choose.
The big letdown of the movie was the story, which lacked some spark because it seemed both very predictable and drawling; this made me loose patience at times.
Besides that the rest was more than OK. The voicing was chosen with pinpoint accuracy. And the majority of the puns had the right amount of wit. What I enjoyed even more was the general sarcastic/parody sense of humor in relation to the movie genre.
I can't voice an opinion on the 3D, but regarding the score: AC/DC, Guns'N'Roses...sound more than appropriate for a villain centered movie.
Maybe this movie wasn't that lucky, and got me on a bad day...so I think you should give it a chance; probably I would do the same one day or another.
Details - Spoiler Alert!!!
The No, You Can't posters were awesome
His introductions were appropriate for a Super-Villain
For the quotes - it's easier :p