I want to see how clones are generally more athletic than the average human. The strength, the speed, the flexibility and agility. The stamina especially. I think it'd be interesting if the average human can go three days without food and clones have a "starvation mode" that can be activated under low-food, stressful situations where their metabolism momentarily drops to conserve energy.
I also want to see the downsides, of course. Yes clones are very strong and they can go long periods of time without eating or drinking, but that need to build of that muscle and those fat reserves somehow. Their daily caloric intake is HIGH, especially because they work out every day and go to battle. Ration bars? Like two and a half meals worth of dense calories. They'd make a regular person sick, probably. Definitely not recommended for children. Jedi get their own set unless they're burning similar amounts of calories on average. The daily meals in the mess hall are less intense.
Maybe their eyes can adjust quickly to the dark or other changes in ambient light. Maybe this also increases the risk of certain eye problems later in life (but since the majority of clones don't reach even middle ages, this isn't a problem).
They're smarter by training/education and have very strong memories because of that. That also means they can't forget traumatizing things that happen to them -- or it's harder to forget, at least.
