I've owned my car for 15 years and it's been through several versions of the same ol' 355/4-speed combo. I really identified with the Car Craft RSE as a way to truly judge a car's performance.
Each time I'd break the car I'd tear it down and build it back up a bit differently. One of these breaks came right as the Red Witch hit the scene. That car, above all others, really set me in this direction. I decided to really tear into the car and do something drastically different from my previous builds. It was a very ambitious goal considering my budget, or lack of it. That's why it took 7 years to accomplish (it's been down since 1997). I took everything that wasn't part of my final vision and sold it, making sure I wouldn't short cut or settle.
I think the build style of Pro-Touring is a natural evolution. Plus, it's real hard to do something different with an old Camaro. I'm intrigued by the challenge of balancing old vs.new vs. old. Unlike a couple of you guys, I don't want to see the bodies being altered much. I want an exotic supercar in Musclecar skin. Go look at the flared-fendered bondo machines of the '70's as an example of well-intended body mods, now taken out of context.
Even above the "look" I believe in the performance aspect. That's why I'm not a fan of 20's on the cars. They are the opposite of performance, IMHO.
If I were to do it again, or next, I'll probably build an LSx with the turbos. GM really hit it out of the park with that platform and I see it becoming a very common swap. There will be a backlash against the "look" of these cars, I forsee, but most of my mods are function over fashion, and performance never goes out of style.