I've got the Tech 21 & Cruzerlite Bugdroid...still deciding between them. I like the phone without a case, but it's a little too big for my hands and I want to be able to use it with one hand without being too worried. Both of these cases are very easily removed, so it's nice to have.
They both have grippy edges and make it easier for me to hold and operate with one hand.
Cruzerlite has a slimmer profile, with cutouts for the power & volume buttons.
Tech 21 is thicker, there's an extra piece inside the edge to absorb more shock if you drop it, so it adds some bulk to the phone. As others have mentioned the power & volume buttons are more difficult to press with Tech 21 because they are covered with integrated buttons molded into the edge. I think that's something I'd get used to.
Currently leaning towards to the Cruzerlite. It was only $9 vs $30ish for Tech 21.
I have some pics I can post, not sure if I'm allowed since I'm new here...) If I'm allowed they'll show up, not the best camera because I obviously couldn't take them with my awesome new phone
DT2 white/silver w/grey ballistic nylon back.