I must admit, I enjoy Pepsi quite a bit. It has a nice, smooth flavor that is a hint bitter. Coke is a very sweet cola and is really an accompaniment for other mixers. Since I don't drink very many mixed drinks, I drink Pepsi. Pepsi goes very well with Burger King fries as well.
I'd take a Coke over a Pepsi almost any day. Pepsi is just a bit too sweet for me, and not as refreshing. A nice cold Coke is one of the most refreshing drinks there is! If you're in the mood for something really sweet then I guess maybe go for a Pepsi, though.