1982 or 1983 ... my neighbor had ColecoVision and I was obsessed with the Smurfs game. We had Atari 2600 -- I loved Barnstorming, Pitfall, Haunted House, Raiders of the Lost Ark, Pac-Man, Grand Prix, Enduro.
My mom worked at a bowling alley at the time, so we'd spend non-school days with her. The arcade had some of the greatest cabinents ... Donkey Kong, Zaxxon, Dig Dug, Bagman, Pac-Man.
It's not a matter of opinion. Gears 2 looks factually better than KZ2. The environments are more vivid and detailed. Horizons are more realistic. Character models are more detailed. Lighting effects are more pronounced and realistic. Destructible cover, more unique enemies, larger-scale battles, more unique weapons.
Face it -- KZ2 looks like a CoD 4 knockoff. Gears 2 has established itself as its own franchise with its own identity. Killzone was a generic me-too shooter on PS2, and looks like it will be another generic me-too shooter on PS3.