Forceflow: It wouldn't fit together as a grid if they aren't the same size.
Habboi: Can't quite make out, well, anything there
http://www.cubedomain.nl/images/wallpapers/pn03_2_1024.jpg
Maze: I think I'll probably go with something along these lines, and try to continue the hexagon theme into them (eg. hexagonal knots in the wood grain of wooden objects). I may also go slightly away from the hexagons by having non hexagonal objects above the initial "heightmap".
Thanks for all the comments so far guys




