I have several different brands and models but the ones I like best are the Primos Trigger Stick and the Bog Pod. I use the Trigger Stick monopod the most because it is lighter. It works great for me either standing or sitting. I am primarily a handgun hunter but I use it for rifle hunting as well.
I like my Primos tripod trigger sticks. They are bulky and heavier, but very stable. A buddy of mine has the bipod version and the head (grip, yoke) is subject to tilting over at the pivot points for the legs. It is still stable once it does, but very annoying when it happens.
The primos trigger stick tall tripod has been one of the best purchases I have made. It really has spoiled me its fast, light, and easy to use. People hunting with me have shown up with other sticks and ordered these before the hunt was over.
If your going to be standing I would recommend the Tripod version of either Bog Pod or Primos. I have had several of both brands. The old Original Primos was heavy but very steady then the second generation although lighter the legs were not quite as stable and now they are on the third Generation and they are OK. Bog Pod is maybe better but not as quick on the adjustments.