completely dumbfounded

[cortjstr]

I am stumped about something. I am currently playing in a $4/$8 game. And during the course of 9 or 10 hours I will win some huge pots. (12 or 15 times the big blind) I don't lose very many big show downs though. Here's my dilemna, after so many hours of playing i will usually leave about $30 or $40 dollars ahead. I am trying to figure out why i'm not a bigger winner. To me, $3 per hour against not very good players seems not very good at all. As with almost all low limit games ..these games are usually very loose ..lots of pre-flop limpers. Anyone with any ideas?