I don't have a "TIVO", but I have the following:
Comcast dual tuner DVR in living room
Comcast dual tuner DVR in den
Replay TV in bedroom
The following are their uses:
The Replay in the bedroom is to record the soap One Life to Live for my wife, so she can watch at bedtime.
The Comcast DVR in the living room (main audio/video system) is used to record random things of interest (movie, TV show, award show, etc), and it records MTV's Headbangers Ball on a regualr basis so I can make music video DVD's for archiving. Of course the pausing/etc of live TV is awesome - I don't believe i could do without it anymore.
The Comcast DVR in the den is for me. SOme TV is watched in the den, but I also use this setup to wirelessly send the TV signal to my workout room in the basement, for which I am in from 1 to 1.5 hours a day. My favorite thing to watch while working out is.......................wrestling, something I have been watching since I was a kid, and am now 47 and still enjoy this best of a man's soap opera. I record all three brands of WWE (Raw, Smackdown, and ECW), as well as TNA. When Nordictracking for 40 minutes in the evening, I watch the wrestling.