I have a + bb/100 with every pocket pair except KK. With AA I'm about 450 bb/100 and with QQ about 600 bb/100. Even with JJ and TT I'm about 50 bb/100. But with KK I'm -32 bb/100.
Something strange, too. With high PP and TT I tend to have roughly a 95/90 VPIP/PFR ratio. With KK I have about 60/35.
Anyone got any comments?