Obviously, the answer is the GM(C) New Look.
- Built in Canada
- Built for a ridiculously long amount of time, from 1959 to 1986
- Last ones went out of service less than a decade ago
- Cool windows
- Rear mounted two stroke diesel, V6 or V8
- Vinyl seats
- Most importantly of all, available with row-your-own gears
I challenge you mere mortals to find a more enthusiast-focused bus.