Really? What killed my interest in videogames was the failure of the dreamcast (and to a lesser extent gamecube), and the move away from the PSX/N64/Saturn to newer systems. After those faded away, games companies went from trying to make videogames to "generic action film #145347, by an incompitent version of pixar. oh, and you have to push buttons too". I have to say that those four/five systems are probably the greatest consoles of all time.
3D didn't ruin videogames. aiming for the lowest common denominator, and people realising there was money in it did. I think there should be a "polygon ration", because the gta series always looked cack in 3D but were great games. GoW, Later NFS games, all sports titles since forever? Crap.
I never was that into Amiga games: Deluxe Pacman, Deluxe Galaga, SWOS, and Slam Tilt were the ones i enjoyed. The amiga 3D shooters didn't do it for me, bur for some reason I had this obsession to prove I could out-Doom Doom, and the 060 I bought for Cinema 4D came in handy. You'd be mad to have spent the money on an 060 card to play Alien Breed 3D or Breathless though.
The gamecube was the last console bought, and that was for my son's 10 th birthday. But I still think the Nintendo 64 was the gaming machine i had most fun with. The tight control of most games and the analogue stick was gaming heaven. i think the single button joystick limited the precision of control and may have been a factor that stymied the progression of Amiga games.