AC3 isn't my favorite, but I'd recommend to at least play it once since it's one of my favorite settings in the series and Connor (though it takes a little while) is a good protagonist. The story is fine for the most part. Liberation surprised me, I had an overall enjoyable time with it and Aveline's a fun protagonist.
I guess I could give AC3 another shot especially if the remastered version holds up well compared to what the series has become
Maybe I would enjoy Liberation as I'm playing Odyssey as Kassandra who is one of the better protagonists in the series