I like Pepsi more than Coca Cola for sentimental reasons, but I like the taste in Coca Cola more than the taste in Pepsi, for the most part, but diet Pepsi - or anything, for that matter - is horrible. If this was a Diet Pepsi vs Diet Coca Cola thread, however, I'd choose Diet Pepsi. Diet Coca Cola is a fiend in my book. It tastes horrible.
Anyway, Coca Cola please!