Learn Hardcore Korean: uri chwihyangi gateoyo.

Here 우리 is possessive and means our (so: Our tastes are the same). In Korean, 우리 typically includes the listener (inclusive we), but context can also mean our group vs. another group. If you want to make the subject explicitly we, you can say 우리는 취향이 같아요 (As for us, our tastes are the same).

Why isn’t it 우리의 취향이 같아요? When do Koreans drop 의?

Native speakers often drop 의 after personal pronouns in everyday speech, so 우리 취향 sounds more natural than 우리의 취향. Keeping 의 is fine in careful or written style, or when you need extra clarity or emphasis.

Why is the particle 이 used after 취향? Could I use 는/은 instead?

이 is the subject marker used when the noun ends in a consonant (취향 ends with ㅇ). With a vowel, you’d use 가. You can use 우리 취향은 같아요 to set our taste as the topic; that version contrasts or highlights it more, while 이/가 simply marks it as the grammatical subject.

What politeness level is 같아요? What are the other common forms?

같아요 is the polite informal form (–아요/어요). Other key forms: