What do you think you are an expert on?

Sometimes you need to be proud of yourself a bit. What do you think you are exceptionally good at?
Correct me if I’m wrong, but I already know that @CWOTUS is an expert on anything law-related (I asked some law questions myself, and they always gave me the best answers), @PhiNotPi is an expert on Math (they gave a brilliant answer on a math question of a new jelly asking about some number sequence), @dxs is an expert on music (I’m not sure about this but their avatar kinds of indicate that), and @muppetish is an extraordinary English teacher (their explanation of English and English teaching method are awesome).
And me? I’m an expert of eating, sleeping and asking stupid questions!