...get annoyed, you'll mumble to your self "ayaaa" without even realizing it.

...greet your wife with Nǐhǎo fūrén! and your native language is not Mandarin. 

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Wait for dramas to finish and look at the comments/spoilers and then start watching

Deliberately look for Tragedy tag in the spoilers

(My C-dramas with bad endings list has currently 67 titles).

Chinese characters starting to make sense to you because you see the intro/end song too many times...

Nostalgia is happiness and pain at the same time. Seeing too many familiar places in the dramas that you once knew. Gosh I want to go back to Taipei!!!!

Skip the intro to avoid spoilers

Skip the intro and weird parts

- You can name the drama name by listening  to OST

- You start to understand single words and simple conversations in Chinese

- You drop the drama after the first episode and later realize that you've missed the hit-drama (I missed eternal love and I just had a  great 5 days while watching it!)

- You can easily remember the names and faces of the characters. 

Slowly begin to understand most of what they are saying.

Realize an error in the subtitles

Skip the intro so you don't spoil the story xD

Start to realize actors who you recognize from their past dramas where they may have had a small role (example: Maid, Eunuch, Guard). This has happened to me with a lot of actors now aha :)