D&D Homebrew with a huge Forgotten Realms influence. Why? Because me and my group enjoy late medieval / early renaissance 'Lord of the Rings'-like high fantasy settings. As for favorite system, for us it's been D&D 3.5 ever since it came out in 2003 because of the many sourcebooks and character options that system got thanks to the Open Gaming License, but this year due to isolation we've finally made the switch to D&D 5E because it's easy to learn and because of the huge support it's getting here on Roll20 with the charactermancer and marketplace content.