depends. Often, personality is an important part of the job - maybe you're woking with the public, or maybe they're trying to staff a department with people who get along well with each other. I would imagine the higher you go, the more merit is important.
In my work the conscientious ones who keep their heads down and do the work are always ignored for the loud ones who skive and make sure they give themselves a big pat on the back on the odd occasion they actually do anything. I imagine most places are the same and it sucks
That's been the way of things since time immemorial Mike and it'll probably continue to be so. How many people get ahead on merit alone? They have to know the right people and be liked by the right people too.
My brother always knew how to get on with the right people. He's now a senior manager of a large computer company, despite being the only manager who hasn't got a degree. He just got on with the right people. By contrast I've always been a free spirit and I've never conformed to anyone else's ideas. I never got on with the right people so I was forced to go into business many years ago. I'm pleased I was successful and can still say I've never had a 'boss' or 'superior' but if I was more sociable I would probably have had a lifetime of paid employment.
Oh yes.....it's definitely NOT WHAT you know but WHO you know.