I didn't know there are so many hot spices. I usually go for cayenne peper or chilli if I want hot food.
But I do miss the umami taste. That is the taste you find in blue cheese and fermented yeast, here available in Marmite. I am about to try some seaweed to check that for the umami taste. It's also found in fermented soy products like soy sauce.
I like Marmite a lot. I use it together with peanut butter.