I've done both extensively, and stillhunted successfully, and hunted from trees without a stand. There are places where one is more suitable than the others. You don't have to restrict yourself to just one or the other, unless you're dead set on not purchasing or using a stand. Mix it up. Natural ground blinds have been just as effective for me as a tree stand. If you want a real challenge, and adrenaline rush, stillhunt when conditions are right.
I stay on the ground now all the time. Scent control, setting up in shadows, on the downwind side, out of eye contact when they approach, tucked back in cover so they can only see you when they enter your shooting lane, having a solid backdrop so you're not silhouetted, all helps. A ghillie suit definitely will have deer looking right through you. I've had deer under the same tree with me when I only had my back against the trunk, with no other cover, and they didn't know what I was. Had one snort inches from my ear in the dark one morning. Eliminate as much odor as possible by just using baking soda instead of any soaps or deodorants for everything to do with your clothes and bathing. You'll have deer in range before they get any hint of your scent, and more often than not will continue on as if you were long gone.
Much less boring on the ground, and you can have many spots ready to move quickly to, and quietly, at any time. Easier to get close to bedding areas without spooking deer out. I always wondered just how often I gave my location away when setting up a stand, or how many bucks I may have educated when I started down a tree in the climber at dark. I can stay until the last minute on the ground, and walk out without having to climb down and/or pack up in the dark. You won't be able to move like you can in a stand. You have to stay as motionless as possible, and be ready to shoot with minimal motion at all times, You're not going to see what's behind you until they come around front. A head turn to take a peak is going to give you away.