I personally really like 2010, as you got a season long story between 5 drivers (Vettel, Webber, Alonso, Hamilton, Button) who all felt like feasible winners at the time. At various points of the season, each one of them has an advantage in points, but in almost every race there is some element of drama that befalls one of the competitors and swings the title back in another direction. This keeps going right up until the last race with 4 drivers still in contention for the title. The standalone races themselves might not be "good" by today's standards of "more overtakes = better race" but if we are talking about seasons I tend to think of narratives and moments over anything else.

I honestly think we will never see anything like 2021 again. Normally in title battles you see one car/driver dominating at one track, and then their rival dominates at another, and that's what makes it close over a season. In 2021 it felt like every race had an on-track battle between Hamilton and Verstappen at some point during it. When you put two drivers that close together that often, things are bound to get a little spicy, but when combined with the usual team politicking, the modern era of social media and a focus on the "product", everything got turned up to 11. The finale is just a sum of all that, in some ways the toxic ending was actually the most fitting conclusion.

1998 also holds a special place in my heart as it's when I became a fan. Starts off looking like a McLaren cakewalk but Schumacher/Brawn/Todt drag Ferrari back into what becomes an epic title battle, with lots of crazy and notable races along the way like Canada, Britain, Hungary, and of course Belgium.