The spending advice I like is that you should build your bankroll large enough to feel safe and aggressive while you play, but reward yourself now and then, so that you continue to value the money you place at risk. How much is that? I don't know. I have a personal minimum BR $ figure in mind, and over that $ figure I spend it on goals, so that I can point out to wifey (and myself), "this is from poker, that is from poker...". And if I ever have a downturn like I've only heard about, I'll still have something to show for all my effort.