What noun in English would be idiomatic to refer to an opportunity to participate in an activity that one is very good at and in which he normally can show his skills.
I am especially after a noun that would follow smoothly right after the word "real". Like here:
His conversational skills are not great and his passive vocabulary is rather limited. This, however, somehow doesn't stop him from participating in our small in-class discussions. And his real _______ is skits. That's when he does his best and shows off all his talent to the whole class.