First of all, to those that questioned it - Hermes and Guerlain have niche lines (and yes, Hermessence is Hermes) - Chanel should have gotten a spot too.
I'm glad to see Santa Maria Novella on the list - they deserve more chatter. i'd have selected Micallef because what I've tried I've liked, but I've only tried 4-5 fragrances and they are VERY expensive.
It is unfortunate only 20 options are permitted... Malle, Montale, Etat Libre d'Orange, Ava Luxe all deserve a spot on the list, but I know it's impossible to get them all.