Desdichado
Hero
- Common mechanic that makes sense and is applied consistently to almost all situations.
- Design emphasis on flexibility.
- The OGL. I use more things from 3rd party products than official ones these days.
- d20. I like have Star Wars, Call of Cthulhu, Wheel of Time, Conan and more all using 90% or so of the same mechanics, yet with a very recognizable flavor difference between them all.