I took all of these into consideration when designing what I'm calling "iTrike". Perhaps paralleling my recent move from Cambridge to Boston, iTrike is a much more legitimate form of transport. I flipped the three wheel configuration so that is has two wheels in the back and one in the front. The back wheels are driven by high torque brushless motors, which I plan to run sensorless to save a lot of headaches. It has big 12.5" wheels with brakes build into each of the back wheels. It even has a comfy seat and footrests for maximum leisure. Here's the rendering:
I haven't started making it yet, so I'm still trying to think about some cosmetic changes before waterjetting anything. I've been busy with my new job but I thought I would update here so it doesn't look like I've been up to nothing!