You should be able to switch to some differant (bumpy, angled, etc) runways for a bigger challenge when landing.
These would be in differant places on Kerbin but say if you got a resource ship to a planet, you could set up a runway. But if it was on Eeloo it would be icy so your plane would slide around or if it was on Laythe it would float and if the craft was heavy it might sink down a bit due to the weight of the craft.
Anyway it's cool to see the different runways made!