I tend to agree. It's all different and anything that's different can throw you some kind of curve.
I don't mind cold water because I wear adequate exposure protection to stay warm but I've had about all the cold weather I can stand. Diving in cold water is one thing, messing around suiting up and dealing with wet gear in sub-freezing temps is something else. I've done about enough of it.
On that quarry vis thing...the fact is that lots of quarries have really nice vis before the divers get in the water. ok, it's not the caribbean but 20 ft - 30ft is very common 30 - 50 isn't too surprising and in some qurries at some times of the year I've seen it pretty close to 100 ft. But...divers will always think it's bad because they always make it so.