Now that I have my "lab" up to speed I've all but dropped 135 and have gone full speed with 120. So... I go through about 20 rolls of 120 and 8 of 135. I suspect when springs comes it will increase unless Obamamonics holds me back again. Oh, it's all B & W.
My rate has picked up some over the past year. I'd say I use 6 rolls of 120/month, maybe 8 sheets of 4x5, and now that I have a new toy, a 6.5x8.5" antique camera, I'll be putting a few sheets a month through that. Most of my work is B&W, but I will throw in a roll or a couple of sheets of color negative film in the mix.