Well I chose the 6th generation because that's childhood memories. But I believe that when it comes to gaming, the newer, the better.
Graphics has never been this good. Plots/stories had never been this good. And like right about now, we're in a generation with virtual reality glasses and motion sensors. If one had come to me and asked me back when I was a kid, if I wanted the new tekken, or glasses that would make it feel as if I were inside the game, then I think all of you know what I'd choose, and what you'd choose.
OMG, inner geek unlock! I'm going to be quite biased given my age and the fact that I did some game development targeted for 4th generation consoles, but I really thought things peaked at the 4th gen era, particularly the war between Super Nintendo/Famicom and Genesis/Megadrive.
It was just such an exciting and warring time to live in, and there was this astonishing quality I remember as a kid when I first played games like Super Mario World on the SNES that just blew me away when I was so used to Nintendo/Famicom.
To me it's the peak of the 2D sprite era. Newer generations started tackling 3D rasterization and games varied wildly in terms of fun to me at that point since a lot of 3D games had an awkwardness where we're no longer just controlling the player but also often fiddling with the camera. 4th gen to me was the peak of platformers in particular.
As much as inlove n64 the only games that stand out are zelda OoT, golden eye, and starfox in my opinion 7th gen takes it. Halo3 & reach, god of war 3, gta 4, gta 5, last of us, uncharted 1-3, skyrim All amazing games