i personally prefer coke.
it tastses better, and its strange, coz i used to like normal coke.
then i started drinking diet coke, and all other soft drinks (including normal coke) seemed to taste not as good, now all i drink is diet coke, it tastes so good (i also feel funny when ive gone without one for a while, i think its the caffeine/stimulants in it doin it) and when i feel funny like that, i drink diet coke and its all better

red is so much a kewler colour than blue anyways.
and britney spears advertised for pepsi i think, eeew!
also, coke has that more classic feel to it. especially in those glass bottles they sumtimes sell it in.