Currently we have an emote to sit on *various* things, but would it not be nice to sit down and rest you feet for real. Maybe add a little hint on the title of a sitting parson like:
'Artic, the dark elf former ratkiller is sitting here.' or something similar. And starting to move would remove the title add-on or you could jiust use 'stand up'.
Yes, this would be nice, and also maybe include a little regen bonus when sitting. Because when asleep, you cannot wake up voluntarily, and I think a "sit" command would solve this little annoyance. The regen bonuses would not be as great as those when one it asleep, but would be noticable
I believe the inability to wake up when sleeping was entirely intentional and to have a skill like sit or rest would negate the usefulness of certain racial skills (eg elf rest). This shouldn't be done.