I think we can all agree that sitting is awesome.
Everything about it is awesome - not supporting any weight, the comfort, the NOT standing part.
Yet, time after I time I offer my seat to someone and they say, "No thanks, I've been sitting all day."
It sounds like you have had an awesome day! Why not continue the awesomeness and sit more? Sitting is not drinking - you won't be hungover tomorrow from sitting too much.
I can't think of a situation where I wouldn't want to sit down. Standing is ok for MAYBE 5 minutes. Like "Hey! We're standing and talking and this is great."
But then I start looking for something to put my arm on to hold me up, then I try to lean on something - around minute 7 I am doing a tripod to avoid standing.
Know what I like to do after a long day of sitting? Sit more. As much as possible. I've never been like - "OH MAN - what a hard day. I am exhausted from all that work - I can't wait to get home and just stand there for awhile. Oh it shall be so relaxing. The standing. I don't even want to lean - just stand and relax - you know, because standing is so relaxing in comparison to the amount of relaxation you get from sitting. Standing rules sitting drools!"
So don't ever tell me that siting is overrated -
I can't stand it.