I only been watching since 2016. So I only have a couple:

October 2016/February 2018: Nick finds out Sully is Christian only to find out Christian was really Adams kid two years later

April 2019: the end to the 1 year JT storyline (him revealed as alive the whole time) in which the 4 women(Sharon, Phyllis, Nikki and Victoria) thought they killed JT a year prior

May-June 2019: the returns of Adam, Chloe and Chelsea

May 2021: Adam and Nick finally join forces when trapped in the cellar during the tornado so Adam can give his kidney to Faith
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I did watch a couple of clips on YouTube though for honorable moments:

1999: Victor smashes the painting and said to Jack "I will smash you"

2005: Jack throws the chair out the Window after Victor takes over Jabot

I loved any moment with Nina (Tricia Cast), especially when she went toe-to-toe with Heather Tom's Victoria:

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The 30-year-plus rivalry between Katherine and Jill is the stuff of legend. I loved this scene when Kay shoots Jill (then Brenda Dickson) in a dream sequence!

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Also, Sheila versus Lauren! Always a fun romp!

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Many more great moments over the years!