How much are you able/willing to spend? How far will you have to carry the stand? Are you taking it up/down constantly? Or does it go up for the season and stay there? And how long do you usually sit on an average sit before climbing down?
I'm primarily a public land hunter, so my hang-on stands go up and down with me everytime I go into the woods, and I often walk a mile or more to my tree. As a result, I consider weight to be a huge issue. But quality lightweight stands are NOT cheap. I use a Lone Wolf stand that weighs in at about 11.5 pounds. But for my more permanent stands I use older Gorilla chain-on stands. Still a very small footprint (18x24" base). Also, if you endure long sits some stands are more comfortable than others (think Millenium) and can be worth their weight in gold.
My ladder stands, when I use them, have historically been the cheaper Dick's/Academy/Menards (same ladder, but branded differently per the store) ladder stand. It's a 15' with a mesh metal platform on top. It's lightweight (for a ladder) and easy to put up, but not the most comfortable. Some of the sling-seat style ladders are infinitely more comfortable.