According to me, an expressed introvert, I feel very sure it is not merely Ne that propels my creativity. There are two words I would boil myself down to: idealistic and creative.Feeling judgments....are often associated with images, feeling tones, and gut reactions more than words
I notice SPs tend to mistrust theory though. I notice they seek out experience more because of this, which might be why INFPs are more likely to be bookish. I know ISFPs who are avid readers, so I'm not saying they don't enjoy reading. Also, there's a difference between understanding the conceptual and the metaphorical and gravitating towards it, as you say. I think the former is intelligence and the latter is preference. My ESFP sister is very smart, but she tends to dismiss my hypothetical musings, which is how I communicate. She distrusts pure theory, and I'm suspicious of pure experience (because it's not universal).
I'm also not as prolific in creating because I am so cerebral. I love to do things with my hands, but getting outside my head and being in the moment takes a lot of effort. The ISFPs I know enjoy the physical process more than I do, and I get bored once I've worked out the idea mentally.
As for INFP descriptions, there are bits and pieces I like of many. I remember liking Lenore Thomson's a lot, but I don't own that book.
I don't like when INFP descriptions focus too much on the altruistic side. This is a strong suit and often an identifying mark for INFPs, but it needs to be emphasized how abstract it is. We usually are not nurturers the way an ISFJ might be. This thread goes into that more: http://www.typologycentral.com/forum...-infp-one.html
I think I'm probably just starting to reiterate those same thoughts .