The best outcome to me is a driver winning who has an interesting personality but they don't have to be over the top. That's part of the charm with some of the drivers in NASCAR that have gotten more recognition than other drivers at times. Their personalities, whether they have won races or not.
Winning is the goal, but I also want to be entertained and if a winless driver is interesting to me ill support them. A driver can win 50 races and still not be interesting or entertaining enough for me or even for the sport.
Edit: I should say that I don't dislike drivers with little outgoing personality. I like the Ryan Blaneys, Chase Elliotts, Christopher Bells, etc. and they appear to be likable drivers overall to support but I also would prefer to see more passion, more emotion, more grit, more anything. It's the type of thing that sports in general feeds off of the most. I was interested in AJ Allmendinger when he was starting out in NASCAR racing for Red Bull and I didn't know much of his personality back then. I just thought that it was interesting that he came from a different background and was trying NASCAR. There just has to be that extra "hook" to connect me to.