I want someone who can bring substance, like custom maps, music, voices, unique virtual play (if we're playing remote), and I expect them to know the rules better than the most experienced player at the table.

As someone entirely new to the community, I may not have a full grasp as those who've GMed and played for a long time. However, I think - if I were to put my hard-earned money down - I want a professional GM who offers more than theatre of the mind. I like visuals and an immersive experience