If I were to get goats (not looking like it at the moment), I was planning on Nigerian. The big issue is that I have never liked goat milk or cheese. However, a goat is probably easier than a mini cow. Also, I acknowledge that I may have hated the milk because of the breed of goats, or that I was just young. Taste buds change.Pgymy and Nigerian is similar - nigerian's have longer production times, but make less of it day to day.
It's why when I got our spanish goat, I was fine milking it - I can use it to make cheese, and other products if it was too goaty, I found that we could tolerate drinking nubian milk, and it's a lot goatier than pygmys/nig.
So I know I need to taste the milk before I buy the goat... Even if saying that makes me laugh because I have "Why buy the cow, when you can get the milk for free?" going through my head.