Similar in our community, mountainous is a starting point, then we might add 1-2-3 roles max for balance, we're quite conservative in that regards - there is a very strong focus for solving via thread, not roles. We never play role madness. This is my fifth role heavy game on OLF/WG so I'm starting to get a grasp of it.
I don't have that strong preference between mountainous VS role madness, just gotta accept it's a bit different game altogether. Also, these role madnesses have a v. high learning curves, especially if you roll Indie, like I did twice. Then you have no idea what to fake claim, when the game gets to mass claiming :D