Higher: I Remember You (8.0 compared to 9.5)
Lower: You Who Came from the Stars (9.5 compared to 8.0)
Higher: The K2 (7.0 compared to my 6.0)
Lower: Suspicious Partner (8.0 compared to my 8.5)
Higher: Protect the Boss (6.5 compared to my 7.5)
Lower: Twenty (9.0 compared to my 6.5)
Higher: Goong 9>6.5
Lower: W, I dropped it  
Higher: Cheese in the Trap (6.5 compared to my 9.0)
Lower: Goong (9.0 compared to my 6.0)
Higher: Another Miss Oh (7.5 compared to 8.0)
Lower: Drinking Solo (9.5 compared to 8.0)
Higher: 1 Litre no Namida (8.0 compared to my 9.5)
Lower: Marriage, Not Dating (9.0 compared to my 5.0)
Higher: Tunnel (7.5 compared to my 10.0)
Lower: Secret Garden (7.0 compared to my 4.0)

@StarlitStorm, I actually like your ratings! They seem very reliable and most of the dramas you have given a high rating are the ones I have enjoyed a lot! Maybe I should go look at your list whenever I'm unsure as to what to watch next?
Higher: Suspicious Partner (4.5 compared to my 8.5)
Lower: Tunnel (10.0 compared to my 8.5)

Apart from these, I think our ratings are pretty similar.
Higher: Moon Lovers SHR (8.5 TO MY 9.5)
Lower: The K2 (6.0 to my dropped xD)
Higher: the Heirs (from your 5.5 to my 8.5). It might have been ridiculous, but man, I enjoyed every minute of this ridiculousness. 
Lower: The Greatest Love (from your 8.0 to my 6.0). I thought it had many cliches that I didn't really enjoy. In my eyes it was like a worse copy of The Master's Sun.
Higher: Secret Garden (6.5 compared to my 7.5)
Lower: Boys Over Flowers (7.5 compared to my 6.0/dropped)
Higher: Heartstrings (5.5 compared to my 8.5)
Lower: Goblin (8 compared to my 5)
Higher: Kill Me, Heal Me (7.5 compared to my 10) It wasn't perfect but I loved every minute of it!
Lower: Hi! School Love On (9.5 compared to my 4) I have a review on why I dislike this drama. Lol!
It was really difficult because we have very similar tastes (according to ratings) but...

Higher: Personal Taste (6 compared to my 8.5) I loved this drama, I could rewatch it until death, one of the funniest I've ever seen. Just 8.5 because the girl needed large amounts of self-love!
Lower: Protect the boss (10 compared to my 8.5) Enjoyed it a lot but not that much :/