Personally, I've only been to Moho twice in three years (I only play KSP once a month). I find it really frustrating to go there, especially if you're not using nuclear propulsion. The surface of Moho is very flat and the overall landscape is a little too dull for my taste. Dres isn't much better but it has some nice canyons, and getting there is relatively easy by comparison, at least for me.