I'm working on a new grassland themed biome with high hills spread around it. I wanted to make one of those more classic layouts with bunch of trees, water hexes and hills spread around the flat terrain, but access to hills being somewhat more cumbersome, making them those points of interest you play around. I also didn't do anything fancy to map borders on this biome, so it can be easily connected to other Grassland themed maps if you want to mix them up. I think it works cool with Grasslands/Badlands connector I've posted a while back.
I'll be making a couple more adjustments.