The Rocky movies come in pairs: 1 & 2 are rooting for the poor underdog. 3 & 4 are rooting for the rich boxer through a revenge plot. 5 & 6 are rooting for a past his prime boxer with son issues. Creed 1 & 2 are a completion of where Part 5 started as well as playing out 1 and 4. I view Grudge Match as a slight tangent. My favorites are 1 and 3. One captures the gritty Rocky without all the Soap Opera antics of Part 2. Three is more entertaining than all of them and 4 just feels like a flag waving carbon copy with a robot thrown in. 5 and 6 are lesser but my least favorite may be Creed 2. It tries to hit the same revenge beats of 3 and 4 but less successful, and without that it is hard to root for a wealthy boxer.