Analog Joystick (no idea what games to play with this)
There's a list here.
* A pair of sticks off a T-Mek or Cybersled (both games require two analog trigger sticks per player) or similar analog trigger sticks -- preferably with a thumb button or 2.
See KADESTICK link in sig if you need an interface for them.
I have a bunch of joysticks, but please list any that would make the game that used it feel better
* LS-30 or Happ mechanical rotary sticks -- game list and MAME settings here.
NOTE: Make sure you don't accidently get Loop-24 or Happ optical rotary sticks instead of the mechanical versions.
There's a KADE firmware for mechanical rotary sticks, in case you need an interface for them.
* Discs of Tron push/pull spinner
* Lunar Lander thruster
* Atari volcano cones/buttons and SW yoke parts -- always good to keep an eye out for stuff like this.
Happy hunting. 
Scott
Thanks for the lists. I have a pair of LS-30s, I just forgot to add them to the list. I was looking at the shelf, and those aren't mounted yet. I was having issues with the rotary movement, so I will try the settings from the list to see if it helps.
I had a T-Mek control panel set aside last time I was at the warehouse, but I have never played it so I didn't want to take up that much storage space.
I will look for the push pull spinner, but I have never played DOT, so not sure if it is worth the cost.
I had a Lunar Lander thruster, but I sold it. It was $200, and I bought an arcade game with it. I do kinda wish I had it back, but I don't play the game much. Would have made a great throttle for flying games though.
I do have a few of the atari buttons around here. That reminds me, I need to make a panel for Missile Command buttons.
I have a new star wars yoke, so I am hoping it will last. I am actually going to try to sell off most of my parts once all of the panels are done. Trying to keep my storage of parts to an absolute minimum. I am trying to get out of the habit of hoarding parts in case I need it. It is almost always easier for me to just buy it when I need it.
Thanks for post. These are the kinds of things I really wanted to think about before walking through the warehouse.