Personally I really the loops subgenre, with stuff like stuck in time, increlution, cavernous, etc. They give such a strong sense of progression over time. I think a lot of that is how the speed improvements are polynomial so progression didn't feel like it diminished over time.
The thing that I find the most interesting is usually where there's an in-game logic to the prestige; it's not quite the right genre but hades deals with this incredibly well.
What's your favorite implementation of a prestige mechanic?
Personally I really the loops subgenre, with stuff like stuck in time, increlution, cavernous, etc. They give such a strong sense of progression over time. I think a lot of that is how the speed improvements are polynomial so progression didn't feel like it diminished over time.