Women uniformly hate them.
And it will make mugging you easier for me.
OK, the women who chime in to disagree (pssst, same sort who post a lot on the internet). They probably like fantasy and sci-fi as well and . . . well I'll be nice and stop there.
EDIT: There are exceptions. Gebre can rock his. William you are a red-headed maniac. Tone that down. Coming from some who has had to carry the burden of being various degree of red-headed in life, the ponytail is horrible.