You might have been more arrogant when you were young because you might have actually been smarter than most people around you. As people grow up they self select into careers that require intelligence and most of them are no longer smarter than most of their peers and signaling 'I'm smarter than you' becomes unfounded and starts to look silly.
To avoid arrogance signalling let's instead poll for it:
I think I was smarter than my class-mates in school [pollid:1078]
I think I was smarter than my co-students during university [pollid:1079]
I think I was smarter than my colleagues on the job [pollid:1080]
I have appeared arrogant in school [pollid:1081]
I have looked silly in school [pollid:1082]
I have appeared arrogant during university [pollid:1083]
I have looked silly during university [pollid:1084]
I have appeared arrogant on the job [pollid:1085]
I have looked silly on the job [pollid:1086]
For referen...
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