With 4w5, well, I like art and an occasional sulk, but I don't know if that's sufficient basis for the 4 diagnosis. I do get very jealous whenever I see someone doing something I think I do well even better than me. I don't know if that's driven by a desire for uniqueness or a desire to avoid incompetence.
Glycerine has always struck me as one of the most perceptive and thoughtful posters on TypeC, and I very much appreciate her input.
As for tritype, I already identified mine as 459, but I don't actually like the idea of tritype that much. It seems like a way to enable indecisiveness to me. That's all well and good when you're looking for reassurance rather than answers, but it doesn't suit my goals at present. I think concretely identifying basic fears and defence mechanisms is a great first step to growth, fulfillment, and the way to Candy Mountain. I'd much rather deal with the issue head on rather than shelter behind more vague possibilities in an attempt to avoid making a decision.
@BlackCat, whose opinions I value, suggested 9 because my personality is kind of fluid and amorphous. I don't particularly like thinking of it that way but I suppose there's some truth to the assessment.