I'd say if you can drink Gatorade without puking and it tastes good (I love the lemon lime Gatorade), then stick with it. Everyone is different, but I drink Gatorade and only Gatorade because it's cheap and I've been drinking it ever since I played basketball as a little kid. If you're worried about the sugar you could dilute it a little bit. Or you could carry two bottles- one for Gatorade and one for just plain water.