I loved lightgun games on the old systems, and I think the Sega Saturn's Stunner was the best hardware of the lot. The obsolescence of CRTs pretty much killed the tech, but the gameplay style has made a bit of a resurgence a couple times with the advent of the Wii and VR.
Fishing Controller and a copy of Sega Bass Fishing for the Dreamcast was good fun.
I'm a big fan of the lightgun more though and have so many good memories. Point Blank, Die Hard Trilogy, Virtua Cop, Time Crisis, Confidential Mission, House of the Dead and even Ghost Squad and Red Steel 2 on the Wii were all so good.
House of the Dead was an all-timer.
I also loved the Jurassic Park arcade game.