PS2.
Based purely off how good it seemed to me, for its time. It turned your TV into a gaming set-up that you could have days and days of fun with, for an accessible price. Just the natural next step in the evolution of all the great old atari and Sega consoles that had gone before.
PS3 was obviously 500% better in every measurable way... but it was an expensive major purchase for me then, and the menu structure was confusing, full of features I didn't understand and didn't want anyway. (I just wanted to sit at home by myself in peace and quiet and play the new generation version of games I had loved previously.) And the disc reader got unreliable after a while.
PS3 introduced me to Skyrim and I will always appreciate that. But it's also the console that drove me away from consoles to the PC master race.