I only bought a simple and (in "she who must be obeyed"'s words) "butt ugly" neoprene case just to store when travelling.
Otherwise, I like the tablet caseless. We bought an incredibly light tablet and then make it heavier by slapping a case on it. Doesn't make sense to me.
Galaxy Note 2 on 4.1.2 (N7105XXDMB2)
Galaxy S2 on 4.1.2 (I9100XWLSJ) + Siyah s2 v6.0b5
Xperia Tablet Z on 4.1.2 (10.1.1.A.307)
If eating could save the world, I would be the super hero.