I find a director's chair works best for me. I currently have one I found on clearance at the Coleman outlet store in Wichita that I find comfortable for hours, and one of the arms is a small table with a cup holder.
The old aluminum frame folding lawn chairs with webbing work pretty well until metal fatigue or heavy visitors break them. Similar folding web chairs today are often steel frame (cheaper?) but don't work so well, I feel pressure from the square steel tubing that I didn't feel from large diameter round aluminum tubing.
Bag chairs are a struggle for me, force me into a slouch that hurts my lower back, and they are hard for me to get out of. Kids got me a bag chair with rockers, that helps launch me out of the chair.
