A high IQ doesn't necessarily mean you're creative, divergent, and/or a visual-spatial person. I know some may dispute it, but visual-spatial people do think and learn differently.

The vast majority of tests and work on giftedness involve auditory-sequential children or those who sit still, pay attention, think linearly and sequentially - you're ideal student. Performance in reading, writing, and math are easier to measure than say art/music or STE part of STEM. Here's a chart between the two - http://www.gifteddevelopment.com/Visual_Spatial_Learner/vsl.htm

Creative and divergent thinkers do think differently; and the two are separate. Many creative people are divergent thinkers, but not all. Still, the two often go hand and hand. I think of this with artists/musicians/writers. I'm thinking of Captain Underpants' author Dav Pilkey and Roald Dahl - both of whom are highly creative and divergent thinkers.

Dr. Linda Silverman (author of Upside Down Brilliance) has studied those visual-spatial people like Dav Pilkey and how they can have high/average IQ and still excel in creativity and visual-spatial abilities. What she noticed with profoundly-gifted visual-spatial kids with high IQ is that they had exceptional reading, writing, and mathematical abilities. Some of the visual-spatial kids with lower IQ scores had learning disabilities (dyslexic) or attentional issues that hampered them. She describes how visual-spatial kids think and learn differently, which some of us have found very helpful.

For divergent thinking, here's an article from Dr. Lovecky's center:
http://www.grcne.com/divergent-thinker.html

Here's another article on high-IQ, creativity, and convergent/divergent thinking. It says that IQ does not measure divergent thinking and is only one piece of the puzzle:
http://www.psychologytoday.com/blog...ergent-thinking-are-necessary-creativity

As a parent of a 6.5-yr-old, eg/pg visual-spatial kid, I can understand and identify with what you're saying - lack of consistency at times and out-of-box thinking. How to nurture - besides arts/crafts? Well, I try to make sure we've got Legos and plenty of building blocks (wood or cardboard) around or opportunities for open-ended play (i.e. multi-colored pom poms for imaginative baking). I really don't do anything, but let my son think of different ways to use the materials - heaven, forbid, I make a suggestion or have an idea.