Much prefer floppy to stiff for AH, due to the nature of the game and having to yank the stick around a lot in fights. I had picked up another cheap used 99% condition Warthog Stick last month, and tried it out int he Ki43 and ran out of ammo but had a couple cons I kept evading for 15 minutes - I could really notice the difference in stiffness, as I always use the CH stick for AH.
IMO CH is around the best balance for this type of game, Saitek isn't a whole lot different IMO either, although the spring can make fine movements from center a little less precise in some cases, of the half dozen x36/45/52/55 I've tried, I'd say about half make me unhappy in this regard in particular.