3. Last Minute Romance and Goblin - in Last Minute Romance, the one lead was an actor and he and the FL would act out famous drama scenes for their dates, like from Goblin, Desendants of the Sun, and a few others I think. I believe they acted out the scene where Goblin is giving the flowers to the FL.

4.  The Midnight Studio - had several parodies, but my favorite was the recreation of Crash Landing on You candle scene (ML uses a lit candle in the market to help FL find him).

5. My Neighbour Can't Sleep - My Fated Boy makes a lot of references to MNCS (same universe). There is a carrot in mouth sharing via kiss (ish) scene the MFB redoes but with a slightly different outcome,  I think there are a few such instances. MNCS will be playing in the background and MFB copies with comic/romantic/different outcomes.

6. Boys Over Flowers and Extraordinary You

The 'A3' group of guys in Extraordinary You is pretty unanimously considered to be a reference to the iconic F4 from the Boys Over Flowers saga

Stalling...so here is my entry:

7. My Unicorn Girl   ML Wen Bing was played by Darren Chen who also starred in Meteor Garden (2018), where ML Dao Ming Si famously said, “If apologies worked, why do we need the police?" In MUG, Wen Bing says this same line to the FL.

8. Meteor Garden  - Loving, Never Forgetting.
In LNF, FL makes a garden called "Meteor Garden" behind the school where FL works. When ML (Jerry Yan) coming to the school and talked to the Principal, the Principal said that FL might be in "Meteor Garden" LOL 

9.  Coffee Prince and Love Next Door (the famous line from Coffee Prince  "I like you. Whether you're a man, or an alien, I don't care anymore." and leads in LND "I Don't care if Seok Ryu is Bigfoot or an Alien- the brother even says that it sounded familiar and said coffee prince)

10. The Love You Give Me  and Once We Get Married have the same actors playing the ML and FL in both. In TLYGM, there's a scene, where the family (parents and their son) is watching TV - they're watching Once We Get Married.

Next topic: 10 shows with best masks in dramas/movies.

5. Encounter - Nam Myung Shik played by Ko Chang Seok. Myung Shik ahjussi attends the new years eve maksed ball with a pumpkin mask that is too small for his face. Apologies, I cannot find a pic. It is a truly hilarious (thus I think it is awesome) mask. Some of the other ones at the ball were also pretty cool. ML wore one that looks like it came from the Tin Man (Wizard of Oz), not sure what was referred to with FL's.

7. The Emperor: Owner of the Mask