Oh yes, I like bullwhips as well. They're what I trained with. The "snake" whips are very similar, but their lack of a rigid handle makes them easier to conceal and carry (I can roll my 6 footer up and stick it in my pocket.) They do require more effort to throw though.
Leather is of course better I think performance wise. The nylon tends to be a little stiff and doesn't quite roll out as efficiently. But as Hollywood1340 indicated, they are easier to care for and are less subject to wear from moisture. I grew up in the Appalachian mountains where it's been know to snow in July

. So having something I could take out into the snow was a big plus. Ever cracked in the rain? Also quite fun, sending big fan-shaped arcs of spray.