Napoli which part to stay?

[Giulemani]

I will be visiting napoli for 2 nights in march, basically for the street food :)
Which area or part you suggest to stay in?

In 2023 I stayed in an area called Mergellina which is 15 mins train ride from the centre, near the sea. It felt peaceful at night .

We stayed in Quartieri Spagnoli, it had a hip vibe and good eating options. I don't recall eating street food there though.