In order: Soy, Coconut, Almond, Macadamia.

Almond uses way too much water to be environmentally sustainable, and macadamia just has a weird after-taste that I don’t like.

Soy has a bit of a bad reputation (unfairly so, due to bad ‘bro science’); but I quite like the taste and it has a pretty low emissions/water footprint comparatively.