I'm against Gatorade because:
1) I find that I don't enjoy drinking it while exercising, even if it's diluted.
2) It doesn't sit well in my stomach
Do I need more reasons?
I don't buy the "nobody needs sport drinks unless they're racing for 2 hours" line. Sure, there are rides where you have enough stored carbs so you don't need any extra.
Unfortunately, the amount you have stored depends on what time of day it is, what you ate during the day, how hard you worked out previously, the phase of the moon, etc., so if you're going to ride more than an hour, there's a chance you'll bonk.
Even if you don't, the two options are:
1) Don't use a sport drink, finish your workout with low glycogen stores, with the effect on your recovery and how much you eat. (low glycogen will stimulate hunger and there are some studies that show that your body will try to replace glycogen in muscles from muscle mass).
2) Use a sports drink, keep your glycogen reserves high, don't worry about bonking, and make your recovery easier.
There doesn't seem much reason to choose #1.
Oh, and forgot to mention - you will absorb a sports drink faster than water, so it will keep you more hydrated.
Here's a good link on recovery:
and one on carb vs carb/protein