On a serious note, I am an ultralight hunter. Aside from climbing gear, I usually only carry a kill kit in a Ziploc (Havalon, spare blade, trash bag, pair of gloves, alcohol wipes) a small headlamp, my license, and a bottle of water. During the warmer months, the plan is to have enough room in the pack to quarter and bone out a deer and take everything out in one go. When it gets cold, I have room to carry spare clothes. My pack is not large, and while I'm looking to upgrade, I don't want it any bigger. Small packs force you to leave crap you don't need at the house!
Lightweight is good, packable is gooder. Pursuing either to the point that you compromise safety is no bueno. Comfort? Let's just say I'm still young and hardcore. I did spring for those discounted Arc'teryx kneepads though. Comfort is a bit of an afterthought for me personally until the rut hits and I start my all day sits.
Physical conditioning is huge. I believe lieutenant **** Winters said, "Physical stamina is the root of mental toughness." Even if you don't have a grueling hike in every time, or a lengthy canoe paddle in the dark, being in good shape means you can log more hours in a stand, and not suffer burnout on a long weekend hunt.
I've lost 40 lbs in the past year, and it's been a game changer. I place a lot of emphasis on lower body and core strength. Flexibility is overlooked, but increasing that can mean less back pain and an easier time climbing for sure.
DIET is huge too. Eating cheeseburgers, pretzels, and Coors light at the deer camp is all well and good, but a vegetable or two and some lean protein keep fuel in the tank. I eat a lot lighter than I use to, and while I enjoy my beer and Conecuh sausage, I abstain during deer season. I find I stay more focused if I'm a bit hungry in the woods.
In case you haven't noticed, I'm a pretty light-hearted, happy-go-lucky little feller. But I am very serious about my deer hunting. I do not like hunting with folks that want to stay up late around the campfire drinking, sleep in to sunrise, or drive to the Waffle House for a long lunch and a nap. I LOVE doing all those things, and will gladly roll free and easy on a camping or fishing trip. But I hate driving home from a unsuccessful hunt thinking something might have been different if I had hiked further, climbed higher, or woke up earlier. I still get p*ssed thinking about deer that got away when I was 12.
All that being said, I don't judge others for enjoying their hobby their way. I like light gear, but my dad loves his summit. He's familiar with it and it's comfortable, and that makes it an awesome piece of gear in his mind.