In order of preference:
Bars:
toffee
orange
choc
peanut
cranberry
didn't like the choc mint
shakes:
toffee and walnut
banana
strawberry
fruits of the forest
I hated butterscotch and vanilla - didn't try the others as don't like chocolate or coffee flavoured things.
soups:
chicken and mushroom
tomato (tolerable - but easy to mix without a blender / shaker, so good for work or overnight stays.)
all the others were rank, especially leek and potato - didn't try oriental chilli cos my lips go puffy if i eat chilli.
tetras - banana and strawberry both bearable, but not a patch on the powdered ones, whizzed up with loads of ice. Again - not tried chocolate.
Porridge:
I hated maple and pecan so much (I was gagging trying to swallow it) that i didn't try the others - took them back and swapped them.