does subject matter-matter?

so, past phase 1 in this 3 phase "business plan". i have been rather successful, but since i have incredible high standards when it comes to what i consider "successful", there is a lot more to achieve.
does subject matter in art? how do i feel about it? symbolism- certainly. concrete objects or subject? sometimes.

i am mesmorized by distance, by the "far away", by scale and emotional impact of color. what else? how far can i push it?
blocks? childhood memories? stuffies?
possibly, we'll see. next phase...