I'm being thinking about this...but there might some flaw in my reasoning. Could determining your favourite quadra other than your own be used to determine your subtype? So, if I'm a INTj, and I happen to prefer Delta to Beta, does this make me a subtype?
The flaw in this is that a INTj has stronger than and so should prefer Beta anyway - but I thought I'd post and see what people think :wink:.