Sittable chairs has been sought by many people for a long, long time. In WoW, you can sit in chairs, and that is an MMO. In Skyrim, you can sit in chairs, and that is a single-player RPG.
What makes matters worse is the standard sitting animation. If you sit on a chair, half your body will float in the air as awkwardly as possible.
Yeah, the sitting animation and pose are quite horrid.