Sitting on furniture

[Gerizmo]

I think it would be realistic to be able to sit not only on the floor but also on chairs and sofas. You could also read a book, relax or simply sit on a chair. 

If your seat is close to a TV or radio, your character could even listen to the radio or watch TV there.

[Axezombie]

You should read this:

"And yes, this is the main thing that’s been holding us back from sitting in chairs, lying in beds etc. Modders have done great things providing this in the capacity that’s feasible in the current engine, but are still limited from sitting properly in chairs that obscure the character or face in different directions. We want a proper solution that’ll work 100% when it comes to the main game. "

 

[getstoopid]

There is a mod for this called "True Actions. Act 1&2"