Fat Thor was one of our (mine and my bf's) favorite parts.
His absolute favorite was Cap with the hammer.
Mine was Thor with the hammer and stormbreaker.
But fat thor was amazing and we hope he stays that way in Guardians 3 for at least part of it.
Hail Hydra was also an unexpected great moment.
I did not like the 'all female let's go kick butt cause rawr female power' bit. Just... unnecessary. I also wished Prof. Hulk had a real hulk moment.
Time travel is always messy. The main time travel aspect I did not like was past thanos getting killed... because then it created a major time branch (why return the stones if he was dead). I thought Hulk's whole conversation with the Ancient One was about how they were NOT going to make time branches. If they just sent past Thanos back to the past instead of destroying (and the other major characters that came forward, past nebula, ebony maw, etc) they could have kept the original timeline intact.
Overall a wonderful movie!