In my opinion in English for me it's the writing and then the speaking, the listening part has always been the easiest part. I remember when I started learning English when I was a little kid, I struggled a lot with the grammar and was also very nervous when trying to speak it even in my teen years. However speaking now is almost as natural as my mother language which is Bulgarian, but from time to time I still have problems with the writing, but then again am still learning.