I've also gotten lazy and only used float stoppers above the float and just let it slide down to the weight, but I'm going to stop doing that and go back to having stoppers at both ends of the float. The bottom end of the float has been damaged slightly, from sliding down too fast and hitting the weight when I set the hook.
Plus, if you break off above the swivel which happens me from time to time, you'll lose your float. I've been using the clear plastic floats with two stoppers above and two below the float. This has drastically reduced the number of lost floats (as opposed to just one stopper below the float) but I still may lose the occasional float. I've lost two floats this season - one from an underwater snag and another from a chum. The chum was hooked right in the mouth and was a great fight, but the mainline broke for some reason as opposed to my 8 lb fluorocarbon! Go figure.
Thanks for the reply Rod.