Spoiler!! I have finally watched through to the end.
I love how the final few episodes we get to see some of the original cast. Seeing Carol and Doug going strong doing amazing was nice. Peter working still with Chole and Reese doing great. Kerry and Susan showing up to support Carter. Elizabeth and Rachel really did it for me. Getting to see almost a full circle of Mark Greenes daughter now becoming a medical student got me in my feels. Yes Mark Greene was my favorite character. I will say I wish Carters character got a happier ending. Maybe him and Kem tried for another kid or moved on from each other and he got a family in the end. To be honest though a lot of season 15 was hard to get through. Most of the characters that were left were not characters I really liked. Pratt was probably the last one I really enjoyed his character. All in all it was an INCREDIBLE show with amazing storyline and very talented cast. I will probably rewatch sometime. As for now it is on to the Pitt for me.