Out of those you listed we have only stayed CL at the YC and BC, so I can't comment on the other two.
YC -- great location for the resort, great pool, lounge is just so-so to me (no view, just a large room, really).
AKL -- animals, fun pool, much nicer lounge with better food options IMO. Also they have the nice espresso machine (we miss that when we stay at other CLs). And you can book the Sunrise Safari. Farther out from the parks, though. The lounge is large and overlooks the lobby -- great ambiance.