Here's my .02:
It's not necessary to drink anything but water. Gatorade and other such drinks are just an easy, convenient way to get in the carbs and electrolites that you do need. There are other ways to get the carbs and electrolites, so I say if you don't like the energy drinks, stick with water. Just make sure that you are getting the other things some other way, like crisps and pretzels, if you're riding for more than an hour.