My favorite decals to work on are custom requests... I love when someone comes to me with a thought & finishes with, "can this be done?" That question trigers all sorts of ideas & excitement for both me & the client. :)
Today I was asked for wall decals for a brother & sister team. The brother does karate & the sister does ballet. Mom wanted something different for each, yet similar enough that they couldn't fuss that one had something better than the other.