The only bad thing about being in a band that you don't have much in common with is the artistic differences. Are they into playing the same stuff as you? If not, it's not really worth it. If you try to play with people that are into other things, your band is a stillborn... Dead before it's even born. Being able to relate artistically with the other band mates and be on the same wave length as far as the music goes is really the only thing that matters... It doesn't matter what they wear, how they talk, or what their social skills are like... If they're into the same music as you and you share the same ideas about it... Then you're golden...

However, you did use the word "odd" to describe them... which means you have obvious differences. The best thing to do is just jam with them and kind of give them an interview... See what they're into playing and see what direction they're heading.