I dont eat while gaming unless im using utensils because I hate my controller/handheld to get all filthy from food im been eating with my hands. Otherwise I would eat a bowl of fruit usually, of course we are talking about snacks here since nothing should get in the way of one of your main meals. I just snack on fruit so that would be sliced up apple, pear, nectarine, peach, grapes and maybe mandarin when they are in season.