Standover height is much more important riding in the snow, especially if riding where a lot of snow accumulates. The trail you ride on will be packed down and raise your wheels off the ground, while the snow on the ground will be unpacked and give way when you foot down. So it will drop your foot lower than what you are expecting. A little extra room could be the difference between getting a foot down and just tipping over in the snow. General riding position is about the same as when you ride on mud, expect the bike to sway under you a little bit and just let it go. I find I don't need to change much, set-up wise. I am just glad to have a frame with nice standover clearance (the old style Framed Carbon Alaskan, now marketed as Wolftrax Carbon).