I play boxing on the tv as background noise all the time but I don't really watch it. I've seen all my vids a million times each already. I don't need to watch them anymore.
I tend to watch a fight or two per night.
Depends whatever else is on really.
Classic fights or contraversial get mentioned on here all the time, so usually try and watch them when I get home to either refresh my memory or because I feel embarresment for not actually seening it already.
And most sundays I usually try and download the lastest ESPN fights and any other US PPV's that have taken place over the weekend.