Last time I checked, we were Cheetos eaters, and the cheezy flakes were our mascot, hm.
but no, I enjoy drinking Monster and munching on some Salt and Vinegar chips when running the suicide mission, or saving Cyrodiil. Whatever float ma boat.
definately popcorn because its quick to grab and its a lighter food so its ok that you dont pay attention to how much youre eating and you can just grab a handful while respawning/pausing and put another bag in the microwave in between rounds (at least you can for the games i play) if the popcorns to greasy try a different type with less butter and add salt or one of the popconr salt things they use at concession stands
The best gaming and food session I ever had was literally one entire weekend, we ordered pizza, its easy and if you order it all you have to do is get up and answer the door rather than put it in the oven, it can be greasy but just take a few napkins or wipe it on ypur trousers, crisps and dip, pretzels, bread sticks, basically anything savoury can be eaten fast and with one hand without too much grease, hard sweets like jelly beans and skittles are the best, no grease or mess and easy to eat
Candy. Like Skittles or Milk Duds. Goobers are good too, but they are chocolaty and can coat your fingers. Popcorn seems the best way, I agree with Delos.