I just ordered a 7 and will begrudgingly order a case along with it. I felt like the 5 was the pinnacle for exterior design, and I considered buying the new 5 SE version of that, but I really need/want the latest internals given the amount these devices cost.
Edit: cleaned up some writing in the last paragraph
I'm empathetic. I upgraded a Samsung S5 to an S7 and I'm mostly extremely happy. The phone is astounding, the weight, speed and battery life are brilliant.
Unfortunately, they've done something to the design and finish. It's much more slippery than the S5. I never dropped my S5, and in the 2 months I've had my S7 I've fumbled and dropped it multiple times. No damage yet, but I feel like it's a matter of time. I usually use phones without a case, but I feel like I should buy one for this phone!
EDIT: The S5 has "rubberized" textured back panel and grooved edges. The S7 has a mirror-smooth back panel and shine edges. I feel that they've sacrificed function for form here.
All of the talk of the different color options ends up being kind of moot when you have to put a case on the thing anyway.
Completely anecdotal, of course, but I'd guess something like 20% of phones I see have a cracked screen. I suppose there's little incentive for the manufacturers to make their devices more robust.