@tertia Unless you have a very specific idea of where it should be I think you should always trust your artist. That is, as long as you have a rapport and trust him/her generally, then they should know best.
For me, because I get traditional Japanese, I literally said, I'd like a Jikokuten backpiece, or, I'd like a minogame with momiji and waves. My artist had like three very general questions, and that was that. You give yourself over to the artist.
So, considering your question, I'd say again, as long as you trust them, it's their call.