The Penguins from Madagascar were entertaining; the monkeys even more so. Dragon was ok, but a sequel is hardly necessary. I liked Panda too but five more movies? Ugh.
It's really a pity they can't leave some movies well enough alone. Often a classic movie is far better remembered than a classic followed by two vastly lesser sequels, and no, I'm not thinking of Star Wars. Shrek is what came to mind. Or Austin Powers. Leave it be you greedy bastards.