As mentioned elsewhere, I mainly operate in telegraphy. Consequently, I collected a selection of keys over the decades:

Fixed station use:

• Junker MT (straight key)
• Vibroplex straight key #110512
• Vibroplex Original deLuxe #64287 (Bug)
• Junker Bug
• Schurr Keyer (dual lever paddle)
• Bencher BY-2 (dual lever paddle)

Portable use:

• Padlette BP (dual lever paddle with leg strap)
• Paddlette PK-1 (dual lever paddle with leg strap)
• Whiterook MK-22 (straight key)
• Whiterook MK-44 (dual lever paddle)
• Whiterook MK-64 (dual lever paddle with builtin TiCK-Keyer and battery)