The typical look you see most is blonde and long
Perhaps the other colors are sexy because there aren't as many but I doubt as many would be blonde if it wasn't "working"

brunette, light brown is most sexy to me then redhead.

Every guy has his preference, but the key is finding a color and style that works for you.

ely trimmed landing strip.

During the Day -- office business dressed Brunettes tend to catch my eye. Long, healthy hair for brunettes.

At night, The blondes tend to catch my attention. Could be long hair.. could be short.

Redheads with long healthy hair and blue or green eyes -- can pretty much make me do whatever I want as long...

(And this goes for all of the above....)

Confidence and the way one carries themselves is FAR more sexier than what type and color of hair a woman has.  

My 2 cents...  

Asian style