Never thought of doing this with my nesting dolls, what if #1 was the biggest Doctor and the others inside of him? What if the dolls were square? Anyone who has been inspired can find blank Matryoshka dolls on Ebay.
A hobby isn't supposed to leave you wistful, regretful and vaguely disappointed. BJD collecting is as customizable as the dolls themselves. Do whatever pleases you the most, because otherwise, why do it at all? All for the 'Gram Bitches love the 'Gram.