#1 and #4 jump out to me as the ones I like at least initially...great work! Can you try with a little color? The gray in #1 looks great...but just curious how the color would look.
The orange is nice! #11 may be a little too much for orange, but #12 feels good. Try this...try doing "Open" and "ge" in orange, and doing "Ran" in gray. I am curious how that looks...where basically the word "Ran" stands out.
#13, #14 and #15 have a really nice feel to them! I will have to share with my partner, but I do think (for me at least) it looks better than #12. You have some nice work...love to see some completely different ones now to compare against...thanks!