Mine is of Damon Hill in his championship winning year. I've always had massive respect for a guy who came into F1 and was able to match Alain Prost. Then in 94 had to deal with losing his new team mate and team leader, Ayrton Senna. Almost won that seasons WDC except for some dirty tactics and some lack of patients. Then gets destroyed mentally in 95. Only to bounce back to win in 96, despite knowing he was being unceremoniously replaced, and that his team mate of one season will be taking the team leader role despite dragging Williams through it's toughest period.
Not many other WDCs apart from Mansell and maybe Nico Rosberg can boast of such grit and determination whilst knowing that their raw talent was not quite as good as the best at the time.