Okay people, I've had it. I'm tired of all these ridiculous lists on websites that probably have no idea how hard each sport is, so I figured that if anything can handle this, LRCers can. Please give your personal list on which sports are the hardest, preferably top 10. If you have honorable mentions, list those. Try to base the difficulty on anaerobic/aerobic endurance and how much is required for each. If you need to make separate lists for both, that's fine. Other factors might be the amount of mental focus required, amount of calories burned/fluid lost, and amount of training/intensity of training. I'm not here to scrutinize, but surely we can compile a better list than Yahoo.
To recap:
-Anaerobic/Aerobic Endurance
-Mental Focus
-Amount of calories burned/fluids lost
-Amount/Intensity of Training