What do YOU want in a new wiring harness?

My guess would be to make a harness as close to original as possible to have something that is mass marketable.
I personally would never buy a manufactured harness as it needs to be modified to each applications non stock modifications.
I don't like the painless or similar kits as I feel they are of barely adequate quality and can be improved upon very easily. Price for what you get is not good at all.
I custom build my harnesses to each car using top quality wire, supplies and techniques. This is what works for me without problems down the road. This method takes more time,
looks tidy and neat and appears as original or nonoriginal as you choose. Also very economical for hands on type. Most important you are in complete control of the quality and fit. I can depend on it always.