Bubalo: When I was 12, me and my athletics team reached the national finals. One of the group took a PlayStation, to spend some 'time in the pauses between a competition and another.
Well, it happened that one of us, who had never played Tekken, fell in love and spent four hours in a row to beat little men.
The next day he spent the worst 20 seconds of his life: he had a blister formed on his thumb and was the first runner - yes, the one who gets up in the starting blocks holding onto his second finger and thumb.
Eventually we arrived first, and in the hotel we finished Tekken :)
I don't, but the playstation(s) controller gives me one in my left-hand thumb! (not so much int he right hand) I can play for a day (like 5 hours) and *that's it*, there goes my thumb! It's not a blister, but it does hurt and is annoying as hell. A few days later the skin in the affected zone will be peeling off. As a PC gamer I barely play with controllers (random time I'm with some friend who owns the reviled non-PC gaming platform), so I'm gnereally good!