Flower Crew is a show that, to me, exceeded the sum of its individual parts. I was immediately hooked after reading the premise and couldn't wait to begin watching. Despite being initially disappointed to find the story not going where I wanted it to, I really enjoyed it and think you might too.
(Also, my first review. Not sure why I thought this drama would be a good starting point or why I'm doing this at 2 AM.)

Story: 8
The story breaks down into three parts for me: the romance, the Flower Crew's jobs, and the political intrigue.
The main love line is very sweet, a little cringe... oh and there's real kissing *gasp* Scandalous. There is a love triangle but I never felt overly concerned by the second ML. There is also a second love line that was very interesting to watch play out.
The Flower Crew's jobs serve primarily to introduce you to the members, their skillsets, their relationship dynamics, etc. I was a little saddened that this format died off once we knew more about them as I would've been totally down for a season of episodic matchmaking.
The political intrigue was by far the weakest element and while I understand it is a staple of saeguks, I wish the screen time devoted to it was considerably less. This is not to say the intrigue was ridiculous and nonsensical, but should highlight how much I enjoyed watching the Flower Crew help their clients (and themselves) find love.

Acting/Cast: 9.5
aka "Why I (usually) keep watching kdramas".
Kim Min Jae as Ma Hoon: Plays your "cold ML waiting for his warm FL" to perfection. And if you've never heard his speaking voice before... You're in for a treat. There were times I felt his character was overpowered but other times the opposite so I guess it balances?
Gong Seung Yeon as Gae Ddong: Down on her luck, headstrong (lol), and just lovely to watch. She delivered one of my favorite love confession scenes in recent memory and wished I was on that bridge with her.
Seo Ji Hoon as Soo: played a very sympathetic ML adjusting to a radically different reality. While I didn't love the politics, I would like to add that I really enjoyed watching Soo learn how to navigate the relationships of the court and especially his real talk with the eunuch.
Park Ji Hoon as Go Young Soo and Byun Woo Suk as Do Joon: entertaining characters played very well. Any scenes with the complete Flower Crew were scenes I loved. A minor complaint is that we got Do Joon's backstory quite early on but Young Soo's didn't come in until the last quarter or so.
Go Won Hee as Kang Ji Hwa: loved LOVED her character. I admired her conviction when it came to her life and the sacrifices she was willing to make (and not make) in order to achieve her goals.

Music: 8
This is going to be disappointing for people expecting to find real insight here, but I'm not one of those people who pay a lot of attention to the OSTs. I'll usually categorize them as "bad" if they break my immersion (One Spring Night), "good" if they don't (Hotel del Luna), and "amazing" if they're Goblin or My Mister. This was good.

Rewatch Value: 6.5
Once you reach the end of this road and you know how to get there, much of the excitement is lost. I could see myself rewatching some of my favorite scenes (the confession) but I don't think a full re-watch would happen anytime soon.

Thank you for coming to my Ted Talk. Hope you enjoy the show :)