-Your stronger, tougher, and denser bones/muscles would protect you from most, if not all, forms of damage.
-You'd never lose an arm wrestling match agian.
-Bullies would be a thing of the past.
-You won't ever have to rely on fam/friends to help you move out of the house.
-You'll never be tired.
-Can work all day without the aid of caffeine.
-Can play your favorite sport for hours or hell even DAYS without fatiguing!!!
-And last but certainly not least, pass every push up, crunch, and pull up test out there!.;)
You'd have to be mentally insane to pass up such a sweet ability!:D