Greetings, I am a new DM to Roll20, but have Mastered a number of games on TTS and through voice-only sessions.
I have my own custom world and lore in TTS, but for Roll20 I will use actual DnD literature, until I am more confident.
I like to host Open World campaigns, by which i mean: Players do not have to participate in every session, Characters can join the story virtually freely, Characters need not be comparable in level, and Players may take any actions they choose, regardless of Quest information yet garnered from the DM.