Here is my attempts at trying to animate different weights of balls.
1. Bowling Ball - a lot of weight so it wouldn't have much bounce.
2. Golf Ball - light weight but because of the material it wouldn't have much bounce of squash and stretch.
3. Basket Ball - Medium weight but naturally bouncy, so I used a lot of the squash and stretch for when it hits the ground.
4. Table Tennis Ball - Very light, very bouncy but not so much squash because its a harder material
5. Rugby Ball - This was the hardest as I know nothing about the weight or the way a rugby ball would land so I have to guess from the shape, that it would have enough weight to move forward at first but then go back on itself after the first bounce.
Feedback is welcomed XD