I use floats all the time fixed & slip corks, while fishing all kinds of soft plastics for crappie with a 1/16 oz jig. The advantage to me is that I always know exactly how deep I'm fishing and how deep that crappie was when he hit the jig. I can replicate the same cast over & over.

Now I'm fishing bamboo tops in 15' of water with a 12' B&M pole. Sometimes the crappie are 9' deep, sometimes on the bottom in 15'. Cork & jig weight are balanced so there is very little resistance when the crappie pulls the cork under. It's a very relaxing way to fish and not nearly as hard as allot of techniques.