No, I mean is diving dry, warm and comfortable in cold water as much fun as diving, wet, warm and comfortable in warm water. You might want to reread my question.
I'm just making a joke.
It all depends on what you mean by "warm water." Some people may call 75-degree water "warm."
But if I am doing 3 to 4 dives a day for a week, 75-degree water gets to be pretty darn cold. So if I am doing one or two dives, I might consider a wetsuit under those conditions. But if I am going diving for a week, I will dive dry.
Also the weather plays a big role. If it is sunny and 85 degrees then I might dive wet. But if the forecast is for wind and rain, then I will defintiely be diving dry in 75 degree water.
I went diving in the Florida Keys last winter. The water was 78 degrees, and everyone on the boat made fun of me for wearing a dry suit. But half of the divers on the boat skipped the second dive because they came up from the first dive shivering.
Your personal thermoregulation and body make-up is another factor. When I go diving in Cozumel for a week (80-degree water) I will dive in a 5mm because the repetetive diving really wears you down, and I get really cold on the 4th dive of the day. As you known being cold predisposes you to decompression illness, so I really avoid getting cold at all if I am pursuing aggressive, repetitive dive schedules.
And I've never been bent.
A dry suit is just a comfortable as a wet suit - even more so, because you're WARM.