I've been pretty set for awhile, but always seem to add gear to tinker with trying to justify it for different seasons or hunting locations etc. I still have some stuff I picked up this off season that hasn't been fully vetted but I'll put down what I think would be ideal with a mix of some of it being proven and some of it as what I think would work best.
Sleep System-
For many years I've been a hammock user for most situations. I still stand by that and use a Warbonnet Ridgerunner Bridge Hammock, LocoLibre Ridge Reaper 0 & 40 Degree Underquilts, Loco Libre Ghost Pepper 10 & 40 degree wide top quilts with with Sewn Hot Box footbox, and Warbonnet Thunderfly 13' tarp. I also have some gathered end hammocks setups that I can use to drop about a pound of weight but find I tend to sleep better in this setup so I don't mind packing the extra weight.
I've had a couple of hunts where hammocks weren't an option recently so I picked up a ZenBivy and it has me almost rethinking hammocks. I still think I'll keep and use both, but a ZenBivy works just as well on a cot in a wall tent as it does in a backpacking setup. I have a Nemo Tensor to go with it and would like to pick up a Nemo Tensor Extreme as well. The ZenBivy will likely be my go to in colder conditions though I've spent quite a few nights in single digit weather in a hammock comfortably, I think the ZenBivy is more versatile in colder weather. Still undecided on the tent but I'd lean towards a Durston X-Mid Pro 2 if I had to choose right now. A teepee and stove would be nice on some hunts but for what I do most of the time it's overkill.
Optics-
Kowa 88A, 55A, Swarovski NL Pure 8x32, 10x52, and 14x52 would cover about any scenario I can imagine.
Aziak Backcountry Lite for a backpacking tripod would cover 80% of my needs but maybe a RRS for standing and/or shooting if I ever put more time into that.
I personally like the Outdoorsman's bino adapter and would probably default to that though I know some other good options have recently come out. Since I'd be using it with all Swaro NL Binos I would throw in the Swarovski's TA's adapter as another alternative I would strongly consider.
Tripod Heads- A Wiser Night PH-170 and I actually really like my cheap Ulanzi U-190 for heavier optics. A RRS Anvil and a Wiser Ridge Warden would likely be in the mix if I was shooting off a tripod more.
I get along fine with my ScopeCam adapter for digiscoping, but wouldn't mind trying an Impact Digiscoping setup or maybe a MountainMag.
Pack-
Exo K4 Frame with 3600 and 7200 packs covers all my needs from day hunting to extended trips. I do have both 25" and 26.5" frame stays for different situations as well.
Camp/Other-
For most cooking, my preference is an MSR Pocket Rocket Deluxe with a Fire Maple Petrel Ultralight Pot. I've used an Olicamp pot for years with good success but I like how the Fire Maple lets the stove nest more securely and closer to the pot.
For water filtration I typically rely on a Sawyer Squeeze with a CNOC 3L Vecto as a dirty bag and a Nalgene Wide Mouth Collapsible Canteen for clean water storage at camp. I like the Ultralite wide mouth Naglene's with the Nalgene Easy Sipper insert. I typically also carry a GSI Infinity mug, though I could easily do without it. I like it for measuring water (not totally necessary with measuring lines on the Nalgene and Cookpot) but easier to use and great for sipping hot drinks.
I'm just realizing I've typed way more than I intended to so I'll end it here as I probably already went beyond the scope of what the OP asked for. That said, I like these kinds of threads as it's always interesting to see what's out there that everyone is enjoying using.