Ok spam wall number 2 from me ...
Closely grouped rounded lakes
Eroded top-heavy land masses
More erosion, this time on land...
Plateaus (mentioned previously - I liked the idea of having several of them in close proximity and varying heights etc. (and sorry I know this image has a bit of a WoW vibe going on!))
Swampy landscapes with fungal growths (and maybe some nice luminescent plant life!)