Oops I should probably rephrase that! "Petty" can be used sometimes, mostly to describe a person in a negative manner. Pet subject is an expression, however it is uncommonly used making it unnatural. Good job though at enforcing new expressions into your sentences c: If you want to say something more natural maybe you should say "You want to talk about cooking? It's what I am good at." Or "You want to talk about cooking? It's my specialty."
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
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