I've bought and sold a pile of binoculars over the last few years trying to figure out what works best for me in different situations. Everything from 8x20 to 18x56... $100 Leupold's to $2000 Leica's. Here's what's in the stable at the moment:
Leica Ultravid 8x20. These things are teeny tiny. They fit in the palm of your hand and weigh less than 9 oz, a true "pocket binocular". Build quality is second to none. They are truly a masterpiece of German design and no-nonsense engineering. Performance is 100% Leica. Tack sharp and bright with beautifully saturated colors and excellent contrast. Eye placement can be a bit finicky, as to be expected from a pocket binocular with a 2.5 mm exit pupil. The view is not "easy" but it is worth the effort. These are my EDC binos. They would not be my first choice for any kind of hunting (except maybe shed hunting?) due to there small exit pupil.
Leica Ultravid HD 7x42. A flawless binocular... You can't do any better than these for bowhunting whitetails in timber. Like their 8x20 little brother, the build quality is top notch, they have an industrial feel to them. 7x magnification gives you a wider, brighter image with better depth of field and less hand shake than 10x or 8x. Eye placement is as easy as it gets thanks to the large exit pupil and long eye relief. Low light performance and glare suppression are excellent. Contrast and color saturation is just legendary, and in certain lighting I can only describe the view as magical. These get the nod on nearly every hunt from September-January.
Cabela's Euro HD 12x50 (Meopta Meostar b1.1).
These are my "big eyes" for long range summer glassing. I've tried 15x56 and even 18x56, but prefer these 12x50 and a spotting scope. I'm considering letting these go and looking for a nice used Swarovski SLC 10x56 to replace them.
Optics are just like saddle gear, in that you can buy and try stuff (used), see what works best for you, and sell what doesn't for little to no loss. You just have to know what your looking at, and know a good deal when you see one. Rokslide, birdforum, and cloudynights forums are my go-to's, and there are some good deals to be had on eBay too.
If you're just hunting any deer, I could see how binos might be unnecessary. I want to know if the buck slipping out of the swamp with 3 minutes of shooting light left is a 120" or a 140". Good luck doing that with a rangefinder.