Finally saw this last night - I actually really enjoyed it, though not as much as the first film.

Good: The characters are all still relentless charming and fun. They are the heart of the series, and other than Gamora (who was stuck in the stiffest plot lines with a unspoken romance with Quill and love/hate with her sister) every character was as good or better than last film. The world building, design work, costuming, and CGI were also top notch. Lots of fun work done with a lot of imagination and joy. I also loved the opening credits, set a great tone.

The Meh: I don't know if Ego really worked as a villain. The move slowed down from the second he arrived, and his goals and powers were both vague and cliched. Kurt tried his best, and was charming as well, but the character did not quite land. I also thought Gamora took a big step back from the last film, although they may be sitting her on the backburner for a larger role with the coming Avengers movie with Thanos where she's obviously going to be a major player (the biggest on GOTG team).