In fact, a 2005 study published in the Harvard Business Review shows that people would rather work with someone they like who's incompetent than someone who's competent but not likable.
Wow. Now, from a business standpoint this seems rather stupid. Purposely hiring incompetent people just because they have a likeable personality? Maybe I don't have the same definition of work as most people. See, I thought I was getting paid to perform a set of tasks, not make buddies.