I have always had smallish homemade ones mostly just for chicks, not adults. i tend to use whatever I have laying around to make them when I need them.

I have seen several nice designs that were basically triangular shape that I like. if I ever build a permanent one for adults for some reason I
think that is what I will go with. probably
wood, because that is easy to work with.
what is yours made with? by dome do you mean....igloo shaped or an arched roof? I am always looking for new ideas..