Here's my take....

My idea for a street car is simple. MAKE IT STREETABLE.
Nothing that needs constant maintenance, nothing extremely loud, nothing that runs hot, etc.....

Mild street engine. Big cubes, big power, whatever, but RELIABLE and comfortably DRIVABLE.
Something that has more cooling system than it has a right to.
Ground clearance is a must.
Doesn't have to sit like a 4x4 but a speed bump shouldn't be an obstacle.
Reasonable gearing. If you can't travel for long distances at 60mph it gets old quickly.
Functioning wipers, lights, brakes, steering etc that doesn't require the word "borderline" in any way....

A street car can mean many things, but a true street car should be an enjoyment to drive, not a constant staring at gauges and working on the car, for me at least. It takes the fun out of it.