With me, alot depends on what else is in the water. If the water I'm fishing contains good sized bluegills, I'll usually use a simple #10 foam spider. Bass seem to hit it just fine, and I catch gills between the bass. If the water is loaded with small bluegills, I'll use something considerably larger to discourage the smaller fish.

Of course, I'm fishing northern waters, so a good sized bass runs maybe 3lbs, a 5 lber is a monster. I realize some of the southern guys consider that bait.