Favourite now is spicy tomato wheat crunchies,difficult to track down though.
Couldn't possibly pick an all time favourite as my dad used to drive a delivery truck for a couple of confectionary companies and let's just say the odd box used to get burst now and again.
But we all tended to go for puffs,meanies,space raiders.
I remember you used to get more of a wheat based kind too,cone shaped,sure they were a BBQ flavour it something like that,they were good.