Cashews my least favourite (too fatty/oily). My favourites are walnuts because of the bitter edge. But I also like hazelnuts and their Kentish cousin the cobnut.
Brazil nuts seem to have all but disappeared. They always used to be included in bags of shell on mixed nuts but they haven't been for several years now.
Brazil nuts haven't disappeared. They've just gotten very expensive and so are not put into mixed nuts in good quantity. That's another reason why I buy nuts separately, so that I can mix them as I please, not to just accept what is commercially profitable.
I bought some mixed nuts recently that claimed that peanuts where less than 10%, but it seemed to me that I bought a can of peanuts with a few almonds, pecans and walnuts thrown in.