The X-Arcade original joysticks used in our controllers and cabinets are suited for a wide variety of classic arcade games, they are the same leaf switch style used in most original arcade games. But for some users who want a joystick more suited specifically for fighting games a joystick with a square actuator might be preferred instead. An iL Eurostick or Happ Competition are direct drop-ins as they are the same size and mounting holes.
For Japanese style joysticks such as Sanwa or Seimitsu, you can get a Universal Arcade Joystick Adapter Plate to make it easy to put them into an X-Arcade product.