What started as a series for kids that began to grow up has come back an adult, developed and matured. The new series doesn't shy away from complex themes of existence and growth while maintaining the characteristic charms of the original series. Unabashedly referential and queer accepting, this series clearly let the writers and art teams do what they wanted and the show was excellent for it, down to every detail. To everyone who watched the original series long ago I would recommend this sequel. If you hadn't seen the original then I don't know how it would land, I am interested to know what you thought.
Ending
The end made me cry, I couldn't help it. It was such a beautiful addition to the story, of what happened to Simon coming to grips with what he'd done, Marshal and Gary getting to be in love, the resolution of a world being returned to everyone within 
. The episode where those two got together was way too good. The tension of their lives and Fiona's somehow matched despite being worlds apart. Beautiful.
Calling back to the last episode of the original series hit me like a tonne of bricks too. I remember being much younger than I am now and hearing "Come along with me" for the last time. It was an interesting choice not to use it to close out the season but I think it was a good choice, it was the final signifier that they had moved on from Finn and Jake.
Watch this show so I can talk to more people about it
I watched the original series when I was significantly older than the target demographic (on a trusted recommendation from a friend) and really ended up loving it.
In fact it was about the only enjoyable thing to come out of that period of my life.
Finished up F&C today and also thoroughly enjoyed it.
Hope we get more from the team regardless of what form it takes.
Have you seen the Distant Lands specials? They're really good too