At the risk of sounding like a whiner, I'll just say I loved parts of each episode but then I also hated parts as well. Seeing everyone again and seeing Stars Hollow was wonderful, as well as seeing how people have changed and where they are in their lives.
At the same time, I was disappointed with some of the writing and wanted more of Stars Hollow life and less of some unnecessary drama. I was sad too that some of the old characters only made it into 1 or 2 scenes out of the whole series. I'm also absolutely no expert, but a lot of the things that happened seemed pretty uncharacteristic for people, but maybe it's just me?
Anyway, hands down my fave scenes were the ones with the members of Hep Alien. Fabulous stuff!