I haven't actually played any of the games other than Time Crisis and Point Blank in the arcade. I was a big fan of House of the Dead 2 for Dreamcast, though (Interact's Starfire Lightblaster being the gun of choice). I still have that along with the gun, and I would buy another one so that I could play it with 2 people.
I have also played Jurassic Park in the arcades. It's kind of old, so I doubt it will be ported to the home systems, although I suppose it is possibility if another Jurassic Park movie is made.
I haven't played Resident Evil: Dead Aim, although it sounds interesting, especially to someone who loves zombies movies, House of the Dead, and gun games (yes, I even saw "House of the Dead," in theaters).
It really isn't the same to play gun games with a controller. For one thing, your reaction time is reduced by having to move the crosshairs with the joystick/d-pad. On top of that, it doesn't improve your accuracy.
Maybe if I have some extra time and money I will pick up some PS2 gun games, but that won't be for a while.