I used to love first-person shooters, but as I've gotten older there's a bit more dizziness and sometimes nausea from too much high-intensity camera movement and run n' gun action. Driving games are still as enjoyable as ever, though.
A group of friends and I once played Mario Kart for at least twelve hours, sustaining ourselves on nothing but orange soda and Sweet Tarts. I don't think any of us showed up for school that Monday, still nursing our sugar induced hangovers. Ah, to be young again.