나는 한국에 대한 모든 걸(or 것을) 좋아해. 나는 한국의 모든 걸(or 것을) 좋아해. 난 한국에 관한 모든 걸 좋아해. 난 한국의 모든 게 좋아. 난 한국에 관한 거라면 어떤 것이든 좋아해. There may be slight differences if we dig into them grammatically, but all these make sense and deliver the same meaning. Just one thing to note. When we don't talk about a person or people, we don't say "사랑해", which could be directly translated from the word "love". "like" => 좋아하다(basic form) or 좋아해 (in a conversation) "love" => also, 좋아하다(basic form) or 좋아해 (in a conversation) If you want to put a little more emphasis on your sentence, you can put "너무" or "매우" before "좋아해". "난 한국에 대한 모든 걸 사랑해"? no, don't say it this way. unfortunately, we only love (사랑해) people~! ^^ Do you know the fact that in our parents' generation or before, Korean people would not say "사랑해" often, even to their loved ones? They would put more value on keeping thoughts and words inside their mind or heart. It was a big part of the Korean culture. However, Korea has been changing rapidly.

I would say 난 한국의 모든 것이 좋아