My daughter is almost the same age as yours and does the same thing. The only time we have the TV on with her around is either the Toddler Tunes channel or sports (mostly because it's the only thing we ever watch around those times). One thing I've noticed is that my daughter never sits down in front of the TV just to watch. She has no desire to do it at all. The closest she comes is she'll says "Dance, dance" and point to the TV. If we turn on the music channel she starts bouncing around, dancing with myself or my wife, or picks up a doll to dance with.

We also read every night, but don't do the sign language thing.