Geez, you guys are rich !
I have a Yamaha upright U1 at my dad's, and a Rippen upright at home. I don't play these a lot though, since I don't live at home anymore.
But at uni there's a Steinway, a Bosendorfer, a Bechstein, and a Blüthner grands, plus two Yamaha uprights and two Weimar uprights.
My fav among these are the Bosendorfer and the Bechstein...