HexPlore It caught my eye a few weeks ago, so I watched some videos and ultimately decided against hopping aboard.
Probably its biggest appeal is the mix & match race/class combos, and I like the idea of H-It's modular map, but it loses a lot for me to realize that those varying terrain types are largely meaningless. In contrast, RB's dice system is really neat, the way you can face some slow going depending on the challenge of the terrain.
H-It's seeming lack of story elements is also a negative for me - granted it doesn't have a multitude of expansions enriching it, though. I can see some folks choosing HexPlore It over RB. . .but not me.
Thanks. Much appreciated.