Should I not hire someone who does not get along with me?
This question is fascinating to me on many levels. It shows a weird tendency that we have in academia to equate job offers to something like awards, where the decision for or against a candidate has to be based on scientific (or educational, or whatever) merit alone. I argue that if you posted the question "Should I not hire someone who does not get along with me" over at Workplace.SE, you would get very confused people asking you why you would even consider such a thing. 

To answer this very frankly - no, you should not hire a person that you suspect you will not get along with. Not over an equally qualified person  that you might get along with better, and arguably not even over a slightly less qualified person that you might get along with better. Your main metric for deciding for or against a candidate should be how good you think he will be able to do the job. For a postdoc under your guidance, your suspicion that he will not get along with you means that he will likely not do a good job. That he might do a good job working under somebody else is not relevant to this decision.