I'd like to see a podium at the end of the race and also on the achievements list. I have 53 races and 15 wins but I think 90% of the races I finished on the podium. Someone who finishes 2nd or 3rd gets the same "recognition" at the moment as the last person on the grid.
Just today, I had cracking races against other people where we finished the 10 laps around Nurb separated by less than 0.3sec or 1sec (3 cars). But only the winner gets to track that on the achievements, the others, who were "right there" are relegated to oblivion.
I think it would a) make people take less risks to get the win and screw the guys who are in first place on the last corner and b) give those who race a bit back the chance to fight for a podium finish, which is always easier to get than a win.