The good thing about the shorty is that it's a lot easier to get in and out of. It's also light and a little more comfortable. I just don't feel quite as spectacular in it though. How many wetsuits do you own? Any favorites? And lastly - would you ever wear a rental wetsuit? I wouldn't! Not after I learned that people don't always bother to use the "head" on a dive boat.
Hugs and fishes,