My personal favorites are the original TrueAlerts. Reason being, my elementary school was built only a few years before I got into kindergarten, and they had them when they were pretty new. While I was scared of the alarms going off at the time, I do have a special place in my heart for the pretty unique sound.
Gotta say, I really love the Wheelock CH70. Also a fan of the Gentex Commander 3, Simplex TrueAlerts (that I can actually use), and just about any mechanical horn such as the Simplex 4903-9219.
My favorite NA is the system sensor mass
My favorite pull station in the gamewell century