I honestly could not pick one. I have been lucky enough to receive consoles for Christmas a fair bit. A Commodore 64, Master System, Megadrive, Playstation one, Playstation 2, Atari Lynx, SNES. All of them bought some fond memories. I think the one still most Vivid is when I got the Playstation One. It was not at launch or close to it, but when I got one it came with numerous games, but only one game got attention that day.
Once all the presents were unwrapped and the boring chore of tidying up the wrapping-paper strew across the living room, we rushed up stairs and set it up. Once Rage racer hit the disc drive, that was it, we were hooked. We barely left the room except for some liquid refreshment and meal times, when we were literally dragged from the bedroom. We played, and I mean we literally played from like 10 am Xmas morning all the way till about 8PM the following day. Was just a great day having fun and enjoying time with my brothers.