We'll call this technically first time poster

I was struck yesterday to work on a 32x32 mountain tileset for a visualiser and could really use some C&C. I should explain that the visualiser uses a construction method where blocks are seperated by floors vertically, so that every block has a floor above it, and in some instances below it aswell.

I started out with some mock tiles I whipped up and moved onto detailing and cleaning them. Thats where I've struck a dead end. I think I've lost alot of the "rock face" feel that I saw in my mockup. The ramps were a late addition last night just trying to get a feel for how they might look, just thought I'd get that one out of the way. So really I'm asking for a few extra sets of eyes to take a look and tell me what you think.