I have accumulated about 800k MR on AX so far this year, about 900k all last year from business purchases.
I fly 95% leisure 5% business.
I use points for what I deem the best value, ie; Gap Certs for Kids, Family Travel, 1st Class for Mrs. and I to Europe mostly DL or US. I do give some award tkst to key employees as a bonus and will load up Mother-in-Laws AX on ocassion so she gets good Travel options and keeps me in good graces.