I guess I could learn to live with sitting on the floor, if our church were to ever revert to a non-pew arrangement. However, I guess I'll have to look for an even longer skirt- I don't relish the first 'cold floor' moment when I sit down.
In my parish, most sit for the sermon. Otherwise, we stand, unless there's a serious health reason not to. Except for Sunday Liturgy, our choir stands in front of the church, and this is an incentive to others to stay standing. Very, very few people sit, except as indicated above.