I would like to see some places of the game only accesible for who has the ability for.
I mean:
If you can clim you go up faster and can reach some special montains or places.
If you have swim you can go faster in water and go under water.
If you have run you go faster and jump longer.
If you have jump you can go high.
Etc.
Some kind of instruments or machines could bring you there or help your skills in the same way.