100% business (although leisure is always found), last year around 70k (SNA-SEA, SNA-OAK, ONT-LAS, plus some LAX-LAS, LAX/LGB-DFW). Mostly use AS and WN (had some AA and NW flights - credited to AS). My employer buys miles, so I sold 150k AS miles and 4 WN certificates - gotta use them for something. I still have 170k AS miles in the account, plus several tix laying around.
Being transferred to DFW this summer, so I just joined AA and CO (CO Silver Elite currently). Going to miss those AS FC upgrades, as I get an rt now every month. Seems almost impossible to get upgraded on AA and CO (unless a Platinum).
I don't know how much flying I will get to do in my new position. A lot of it will probably be on one of the company planes (darn, no miles).