Playing a few separate Pathfinder one-on-one campaigns with a friend. One where he's the GM, one where I'm the GM and one where we share the duty (it also includes a strange random dungeon generation concept that allows both of us to play at the same time).

Also interested by Mutants & Masterminds 3e and various other games such as Swashbucklers of the Seven Skies, Spirit of the Century.

I'm a sometimes user of Mythic, the GM emulator.