When I lived in Virginia, it was anything peanut or ham. In Hawaii I loved macadamia nuts ... but in fact, I lived there off and on for almost 10 years, and don't think I ever paid for any of the following:
pineapples
coconuts
mangoes
papayas
limes
oranges
It seemed we always had freinds who would provide us with them. It was very popular to just use a majic marker, write an address on a coconut, and mail it! I had a rarity for a grandfather: a man who LOVED fruit cake. There was a fruitcake featuring pineapple and macs out of Kemoo Farms that was a huge hit with him. It was a huge hit locally, too, after I was though with it (meaning I bought them, then poured spiced dark rum over it, re-wrapped, then served after it had aged a bit).
Believe me, I didn't mean to denigrate the bounty that is California, just wanted responses that were more local. For example, in the area I lived in, it was "Santa Maria Barbecue". I was stunned to hear about this. I lived there and had never heard of it when I grew up. Then I learned it was our normal good-weather fare: grilled, marinated tri-tip steaks, pinquito beans cooked in a chili type manner. The thing you'd actually buy as a gift or take away as a souvenier might be a bag of pinquito beans. You won't see them too many other places. Hmmmm ... I think I might need to get some Lompocian (?) (Lompocals? Lompocanians?) freinds to send me a sack of them!!!