it represents a change,sometimes because they get to a new chapter in their life,sometimes because they want change so they go for the easiest thing to change. and of course,sometimes it's just to keep up with trends,or getting something more flattering. I'd say my reason is usually the change,because,while I really do enjoy changing my hair often,it's more of an impulsive thing,so it's probably a sign of discomfort. I don't know,i'm not freud,i can't go that far in my head.
I get tired of the same old look I've been having for a while.I got tired of my bangs so I'm growing them out again-last year it was the same thing except I cut it because I thought I looked better with them.after a week I wished I didn't cut it so I'm back growing it out again
I change my hairstyle because I want to try something new. I want to look good, and yeah sometimes boredom could be another reason. But the main reason is I alwaysnwant to try something new to look good.