If there is Mt. Dew around in the house then sure I'll have a can around to drink in while loading screens are up or something. I'll tell ya what though. Fuck the Mt. Dew going to the local Sheetz and grabbing a Peach Faygo is what its all about son .99 cents gets you 24 oz of peach goodness.
No. Usually I don't even snack while playing video games, but when I do I don't want Doritos controller and I rarely drink Mountain Dew. I don't necessarily think the whole gaming-Doritos/Mountain Dew brand synergy thing is because marketers think everyone does this, more just that there's probably some overlap between the audience for these products. None the less, these marketing campaigns seem dumb as all balls.
People complaining about Doritos making everything dirty: You are doing it wrong!
You are not supposed to touch them Doritos with your fingers! You are supposed to pour them out of the bag, straight into your face. That's the only legit way to eat junk like that, while gaming.