YOU SAID:
Reading books and cooking are my favorite hobbies.
INTO JAPANESE
本を読んだり、料理をしたりするのが私の好きな趣味です。
BACK INTO ENGLISH
My favorite hobbies are reading books and cooking.
INTO JAPANESE
私の好きな趣味は本を読むことと料理です。
BACK INTO ENGLISH
My favorite hobbies are reading books and cooking.
That didn't even make that much sense in English.