[Tommy]

What the OP asked is a virtually impossible task that is surely destined to turn into what he said he didn't want. Let me offer two simple examples to illustrate the difficulty.
1. Some cars have Jaguar style inboard brakes. They reduce unsprung weight at the wheels (a plus) and they are much harder to work on (a minus).
2. Some cars are longer than others. Some see that as a minus because they appear less like the originals. Some see that as a plus because they could otherwise not fit in one.

It's almost impossible to agree on whether one particular feature of a car is a plus or a minus, so it is even more difficult to determine the overall pluses and minuses of multiple brands of cars that have seen multiple changes in manufacturing over time. I predict this thread will either die quickly or see a long, unpleasant run.