Brunette. I think hot gingers are always going to be nothing more than "hot for a ginger" (not a statement I agree with, but it is what guys always seem to say), and blonde is always going to have the dumb blonde stereotype. Brunette hot girls in general seem to be the most respected by males.
Hot redhead; a recessive characteristic therefore less common and by proxy seen by some as more beautiful. Plus there was this girl in school who had the perfect redhead/brunette shade of long hair... and then she dyed it jet black (respect her choice but I was so disappointed bah!)
Although the shade would never, ever suit me in a million years lol.
All of them suit me around equally apparently Although I find girls think brown/red is best, while certain guys prefer blonde A LOT. Or brown. But since I'm not a dumb blonde I don't mind (although I am pretty slow sometimes so is appropriate) I'm planning on staying blonde, then going red which will fade to brown.