I have mixed feelings about this one. Corn rows look good on most younger guys (well below 30) who keep the style up, but is terrible on older guys, and guys who make no effort to maintain the style. I'd prefer a guy with short hair.
Speaking of braids, I wonder about the guys who get designs in their hair and beads on the end of their braids. Now it may be cute for a 2 year old, but a 21 year old male...I don't think so. Also, once the braids start to get fuzzy, it is time to get them redone. If a guy knows that he won't be able to keep this style up...he need not try in the first place.
Case in point: my boyfriend. About a year ago my boyfriend started growing out his hair. He started getting it braided every couple of weeks. It looked very nice on him because he kept it up. A few more months went by and he started slacking off. He either wouldn't get the hair rebraided or would walk around with this "interesting 'fro."

Reminded me of the song off of Erykah Badu's first CD "you betta pick yo afro daddy...cause it's flat on one side."

As much as I loved him and he loved his hair we both knew that it was time for it to go. He cut it ALL off right before the new year, and in my opinion, is looking better than ever.