I've always stayed away from strange drinks and that will continue to be the case. I think the same as you about malt drinks, but on the advice of a friend I'll try something flavored, otherwise the classics are the best. I prefer a classic latte from Nescafe instead of a sweet potato latte :P
the thought of a sweet potato in any drink makes me think of porridge, way too stoogy.
I've never tried it and I don't want to dream XD