Hello,
Yes, it all depends on your level and also on the audience. I'll explain: if they are not connoisseurs, you can play pieces that have been heard and reheard.
Otherwise, for real accordion lovers, you can play great pieces that are not very well known and on P.A. there is a real choice-I will quote "san fermin" a jota waltz that is great for the atmosphere, also "une parisienne à Séville", "very musette", "la douloureuse".... and so on, but respecting as cindou11 says the progression of the atmosphere.
Here is my humble opinion.
Dan