Arrogance would do it for me as well. I've worked with arrogant devs before (and anecdotally they've written some of the worst code I've ever seen - usually be

Arrogance would do it for me as well. I've worked with arrogant devs before (and anecdotally they've written some of the worst code I've ever seen - usually because they complicate the hell out of things because they think they are smarter than they are) and I loathed it. Be confident in your abilities but don't be a dick about it and always accept the strong possibility that the other person may be right. I saw a phrase I liked on here a while ago, "strong opinions weakly held" that summed it up nicely.