Herbs and spices are more interesting. Coriander, bog myrtle, hemp are ones I've tried. I know a couple of brewers have experimented with cannabis for personal use but I've never had the opportunity, nor would I have the inclination to be honest. A lot of beers will have spices in and can work well. But generally chilli beers are bad beer with chilli in. keep to the Fen Causeway
I can see mangos working with beer, but you'd have to get the right mangos and given the propensity in many parts of "The West" to assume all mangos are the same, I'd not be optimistic.
