I got my 6s plus last week and ordered a spigeon minimal case, but its taking forever to ship. In the mean time, I'm finding that it is easier to hold on to than I first thought after using it for a week. I may just stay naked with it. I used to always go with cases and the last few phones I've gone naked... iPhone 5s and Galaxy s5. The Galaxy being plastic is quite durable and easier to hold than iPhones. I kind of like that... always wondered why Apple didn't make a case that was designed to both look awesome, and was easy to hold and durable. I think they are definitely better compared to the glass iPhone 5, but still not perfect.
I am a guy... someone asked. I almost always keep my phone in my left pants pocket alone... jeans, or business pants. I have always managed to get a few scuffs and minor scratches, but that doesn't bother me... its a flippin' phone, not a work of art or museum piece. Even when I used cases, I'd still get some scratches and scuffs because grit can get in the case, and there are parts of the phone still exposed.
When the case arrives, I'll make a final decision on how I'm going to roll.