It's not exactly my cup of tea, either.
→   나도 마찬가지야.

[예문]
A:For the life of me, I can't find the answer to this problem.
  도대체 아무리해도 이문제답을 모르겠네.

B:Well, it's not exactly my cup of tea, either.
  나도 마찬가지야.

A:I've been racking my brain for the past 30 minutes.
  30분동안이나 머리를 쥐어짜고있어.

B:Listen, take my advice. Take a 10-minute break and come back to it later.
 내말대로 해봐.10분쉬었다가 다시하는거야.