As for the creative piece, this is just my opinion, but I don't think you can rule out creativity from any of the types - maybe different types or inclinations of creativity, but just because the ESxJ descriptions don't mention anything about creativity, doesn't mean the ESxJ person is therefore NEVER creative. I just briefly glanced at an ISFJ description, and didn't see 'creative' listed for ISFJ either - but an ISFJ friend of mine definitely sees herself as creative and one of her favorite pasttimes is scrapbooking, and being creative in that way.
I think a lot of it too is that as you've gotten older, you have been branching out in your traits, or rather, some of your traits/tendencies may have 'mellowed out'. You've mentioned this yourself in a few of your posts!! I think most people (at least those who aim to grow as a person) tend to become more comfortable with all of the different functions as they age, so that it isn't so black and white, and might be more subtle.
From your descriptions of your childhood, you do sound a bit more E, but I also don't know how more extroverted ISTJ's/ISFJ's would act as children. I also get a lot more 'S' from you, and given the Ne/Ni cognitive function results being rather low in comparison to Se/Si, I think that speaks more towards S as well.