I know I go through periods of time where I get like all-consumed with poker, I'll be playing on lunch breaks and most of the night after I get off work until the early hours in the morning. I don't get burned out during these periods, and I play so much because I'm doing well. When I hit a bad streak, quite honestly I get pissed off, withdraw my money, and quit playing for a while. That's not a great strategy, because I should be able to play through the low spots, however.. I know myself, and I know that I will do something stupid like climb up the limits and lose it all, so I cut my losses and chill out for a while.
Then again, I don't have a girlfriend, wife, kids, or anything. And I don't really have many responsibilities outside of work, so I can afford to play like that. And it's not always poker, I go on my streakd of playing online roleplaying games like.. World of Warcraft, or Guild Wars, or Second Life.
Well, I guess I never do actually completely quit poker like I with my RPGs. I just quit playing for cash for a while and play freerolls
, and bar-poker, and play-money.