I find VVT ES to be invaluable for Roll20. This is a set of features that the site should have, but doesn't. I particularly like the ability to create a customized set of macros for players quickly and easily; it makes play much easier for new users of Roll20. The map page management it provides is also much better if you have a large number of maps in a game.

A must-have. Would be interested in finding a json bestiary in an importable format.

Roll20 needs to hire this person.

Fantastic extension. Shame that Roll20 intentionally keeps breaking it because they want their product to be less useful.