A 32" lcd in living room, a 14" recessed in the wall in the kitchen (so we can keep up on news/weather while cooking), an old 26" in the basement for the treadmill, and a 24" in the bedroom, which is used mainly by the kids when we have a gathering going on in the house.
We purposely did NOT put cable into the kids' bedrooms, so they don't become cave dwelling teens.