As for which games have the best/worst players, there are a good mix of both in every game! I've been playing omaha as long as hold-em, just because when we play home games we alternate between the two so it doesn't get too 'samey'. That has been giving me an advantage recently in the low stakes omaha high games and the horse tourneys, as more people are trying omaha recently, and are still learning the basics.
My best advice would be to get more heavily into these games, particularly omaha and razz, so you not only have knowledge of how to dominate an extra game, but so it doesn't get too much grinding the same tables day in day out.
Thats essential to bankroll management. If your not enjoying yourself at the tables and at any point see it as a chore rather than fun, your going to end up tilting and dumping some cash off.