I voted Master System as it was the first ever console I played. This was before I got my Amiga 600. I remember I was given it as a shared xmas present with my older sister.
I also remember when my older sister played on it you could see her temper building and when she was killed she threw the controller down and says “THAT’S IT, I’ve had enough” then stomps out of the room.
We once borrowed Wonder Boy off a friend and we got nearly right to the end of the game but had to pause it because a man came to see me and my parents. So he was talking for a while and then said, “Oh my kids have one of these”. He then took over the controls, played it for a while, said, “I’m useless at this” and then switched it off! You should have seen our faces!