I'm an extremely new GM using Ghost Houses of Phylinecra to start off my very first first full D&D campaign!
Of the many pre-written adventures I looked through, this was the most versatile and interesting to me. The narrative can easily work as a one shot or be expanded to a full campaign and it can be set in almost any world, high to urban fantasy (I'm using it set in a magical realist version of Appalachia). It's truly system neutral, user friendly, and absolutely gorgeous.
tldr pocket dungeon is a dreeeeaaam and I'm excited to check out the others!