Comfort. If I hang a stand, it's because it's way back in. Those way back in spots are for long hunts so comfort is most important. Weight of the stand doesn't matter much since I'll be carrying it twice a season. I love these little $40 hang ons on the market now, but they are not comfortable.
I didn't build it for myself, but for a buddy of mine. Used 16 foot 6x6's buried 3 feet into the ground. Framed it a little different too, but basically followed that plan. Pretty sweet! Hope to have enough land someday to build one for myself!
Here's a ladder stand I built 20 years ago. Actually built two, but lost one a year ago in a wind storm, a large limb from a nearby tree broke off smashing it. I probably won't do another. With the price of lumber now, you can buy 2 for what this one would cost.
Used all pressure treated 2x4 locked to tree at top, at two places, back rest & floor with chain & turnbuckle. Like anything it takes a little maintenance each year and it's not very portable, but does the job.