Had some further thoughts. This is my "really, really, want" games list. I've managed to be ruthless and cut it down to 30 games. Of course, I'd add others (if I've the Gun, then would add Point Blank which I love, if I have the wheel, Chase HQ etc.) but these are those I want without question.
1943,Afterburner,Arkanoid, Defender,Donkey Kong,Double Dragon,Flying Shark, Frogger,Gauntlet,Golden Axe,Golden Tee 2000, Hyper Sports, Ikari Warriors, Kick and Run, Mikie, Mortal Kombat II, Operation Wolf, Robocop, R-Type, Space Invaders, Street Fighter II, Track & Field, Thunderblade, Enduro Racer, Paperboy, Out Run, Ivan Stewarts, Star Wars, Punch Out
That is:
Horizontal (22) and Vertical (

8-way (10); 2/4 way (

Wheel 270 (1), Wheel 360 (1), Handlebar (2), Gun (1)
Rotary (1), Trackball (1), Spinner (1), Analogue/Yoke (3)
Think I've got all of the control methods covered haven't I !! I know you can play some of these with the other controls and setups (rotary onto buttons etc.) but it does highlight my dilemmas :-) It would also be easy to say "only 1 trackball game, so give it up" but although that is one "must have" game others such as Marble Madness or Missile Command were ruthlessly cut and I'd love to have them if the Control Panel design makes it possible.