Well I'm not really a joystick guy, I prefer the TechnoPlus Swift joypads and have two of them. Fantastic control pads, aesthetically pleasing matching the Amiga system colours, comfortable to hold and of course has the all-important autofire button! and a Turbo button which I'm not sure is meant to do.
I've always found the Quickshot joysticks to be pretty good, having one on my old Amstrad CPC with the switch at the bottom which could be toggled for use with several systems of the day - Commodore, Atari, Sega etc.
I also like the QuickShot II Plus - which seems to be held in quite low regard by a lot of people but I have found it to be a decent enough stick.
I am probably in a minority here but I never really liked the Zipstick, and the Competition Pro? Meh.
Spud
