I too am in the basic black "Jet-Fin" camp, have been for decades -- whether the name brand itself, or the many off-brand or generic versions that have since appeared. I prefer their rigidity and negative buoyancy; and it certainly suits the way that I swim. I have spring-strapped ScubaPro, Poseidon, and whatever Dive Gear Express was distributing a few years back -- all large enough to accommodate a drysuit boot, and all bulletproof . . .