In the end, the only thing that matters is what you want to express and how you go about expressing, whether you have a three piece and person band or a 200 person ochestra. If in the process of expressing yourself you end up playing fancy, exotic, uncommon instruments, it's all good. But don't go out and get exotic, fancy just for the sake of it. Ok, you could do that, and see how it goes. Just for the heck of it.
Anyway, you get my point.