I would prefer no painted highlights except for the most subtle. Stronger highlights may look fine in the one pose they were created for, but usually look very bad in other poses. I would prefer to see more hair strand variation - few people have hair of just a single color - each strand can be a range of colors in the general tone (brunette redhead, blond, gray etc) and a few should be considerably brighter/darker than the general tone. I think that is why most of the hair "tint-jobs" look so fake even with painted highlights - they just apply a single hue to the overall hair and that is unnatural except in dimestore wigs.