I have said it before multiple times here, but if you are into watching old baseball games (I say it like that because I personally am not), the 1980 PHI/HOU NLCS was the series that made me fall in love with baseball, 43 years and counting. I was a Yankee fan very young because of my dad, going back to Chambliss in '75 when I was 8, so I saw the 76 WS-losing team and then the 77 and 78 teams too, Reggie in the WS was unforgettable.
But the Phillies/Astros I had zero attachment or primal hatred for either team, it was just baseball and it was such a crazy series to watch as a kid. Best of 5, game 1 was 3-1 PHI (and even that had a late-ish lead change, PHI with 2 in the 6th and 1 in the 7th after being down 1-0 through 5), then all four of the remaining games went extra innings, constant lead changes both ways. The deciding game 5 was 2-2 through 6 and then 7-7 after 8 (HOU 5-2, PHI 7-5, tied at 7, in consecutive half innings), before the Phillies finally took it 8-7 in 10.
My strongest memory is Terry Puhl leading off for HOU and seeming like he got a hit every time up. He was 10-19 in the 5 games, so that's one time that the memory pretty much matches the reality.
https://www.baseball-reference.com/postseason/1980_NLCS.shtml