Haven't tried too many yet. I have a pea protein/vitamin powder that my naturopath recommended I use, but it sort of sits like a gut bomb. She's recommended that I try rice or hemp powders, and I just grabbed the only rice powder on the shelf at my local (small) health food store. It was the Nutribiotic Chocolate Rice powder, and it made me gag when I tried to mix it with water and choke it down. Hence, the recommendations, as I don't want to run around and try many different ones.
At home, for breakfast I eat steamed veggies topped with a little vegan butter substitute, and chicken sausage, cooked shrimp, or some other protein. This just seems hard to duplicate on the trail; I suppose I could mix freeze-dried veggies and freeze dried chicken with a bouillon cube and seasonings. It just sounds a little odd. On the trail, I usually have oatmeal, but I'm trying to reduce my grains in my diet, and I'm allergic to eggs, so that makes the concept of breakfast hard.
I thought I could at least mix some protein powder into quinoa for more protein. Unless someone else had other suggestions.