As a kid, I used to hate my arm hair, because the other kids commented on it from time to time. The hairs are pale, and I learned to accept them - I don't like them, but they're there. My eyebrows, however, are plucked every other day - my hair is light blonde, but my eyebrows are dark brown, and most of the hairs are ridiculously long and thick, so they seem really bushy and in-your-face (which is odd, since they're in my face), even if there aren't that many hairs. I didn't start plucking them until I was 16 or 17, and I've increased the amount of plucking and cutting over the years, finding my "true" eyebrows last year. I don't mind plucking them, but when I pull out a thick hair, I often bleed a little, and that's not very nice... But I feel like I have to do it - I don't feel too good about my looks, and I feel that I have to do what I can to improve myself... When that's said, I think everyone should do as they like with their hair (no matter where on the body it is), and there's certainly nothing wrong about keeping what one was born with
Also, overplucked brows or heavy, drawn brows are awful - I once, at work, had to help a lady who had two sets of eyebrows - shaven off, stubby brows where there was supposed to be hair, and thick, dark purple ones drawn almost a a centimetre above them. I have no idea what she'd be aiming at, but it looked so weird that I hardly could keep myself from smiling like an idiot 
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"No, I'm not crazy, I'm eccentric. Big difference!"