See I would much rather invest time and money into somebody that I like being around and who I think is capable, rather than have some jackass who is really really good off the bat.

Of course there are biases, but that's true weather you hire for skills, personality, or both.

I think a lot of programmers think that your skill level is the only thing you should be judged on, but I think thats mostly because there are a lot of very unlikable people in this field and they'd rather hide behind their perceived skill level than attempt to be a semi likable person.

There is a sweet spot, somebody who has skill but is also not terrible to be around, and can learn quickly. The problem is that most interviews swing too far one way or the other to properly asses for both.