In our house plan our master bedroom is the first room at the top of the stairs. So, in our case, a sitting room is a nice, relaxing place that transitions from the bedroom to the bathroom and then to the hallway.
Or, at least I hope that one day it will be. It our sitting room tends to collect stuff, be used as storage, and get overlooked as a room that could use some decorating. See what I can do with a few minutes of work and $5.29 to make it over.