My favorite statistic on my bike computer is Top Speed!! Because whenever I leave the house, I have a long steep downhill in any direction....just coasting without pedaling I hit about 43 mph : ) I'd like to say it impresses the chicks, but my wife just thinks it's crazy.
Besides that, the only stat I care about anymore is the cumulative distance. I just like to know how far I'll ride from the time I put the skis away until the time I get t hem out again. But I don't have computers on my mountain bike or my ride around the neighborhood with the kids bike.