Right now I'm using the AMS Kraken. Probably the most drop protective case I've seen because of the silicone inner case and the hard outer with extra bumpers on the corners. A little bulkier than the Otterbox Commuter, but except for the corners, less than the Defender.
It still has a lot of openings so I'm not sure how they get their claims for dust. The ports are covered and the bottom mic is filtered that that was it. The screen protector was horrible and I removed that after one try. Trying to use the S pen was like trying to drag it across the sticky side of tape. It barely would move. I removed it and am still using an iLoome flexible glass protector.
I need to find one of the heavy duty waterproof plastic bags for trips to the beach or in the woods when it's rainy/wet. Aloksack or something similar.
I like the conecpt of the wallet/folio because it seems that a well designed one would give good protection to the screen when closed. I'm worried about dropping my phone and it landing so the screen hits a rock, or the edge of the concrete stops in a parking lot, or a low fence, etcetera. Unfortunately besides the negatives already listed about difficulty in use, though I could work around that as long as it folded flat, none seem to have any decent drop protection. Most have an exposed top and bottom, some have exposed corners even. Not a good thing to me. There is the one leather book style that fully wraps the phone in I think a TPU material, but it doesn't fold open flat, it's designed to look too much like a book, to include a stiff spine. Works as a very shaollow kickstand I supposed, but being left handed, it sucks for me. I'd have bought it if not for that. I've thought about making front cover from Kydex for my Kraken, or maybe a thin leather with Kydex flap and gluing it to a Commuter,