Essentials:
1) HERO 4th, 5th or 6th
2) D&D 3.5Ed
3) any one of Traveller, Deadlands, Space: 1889, Paranoia, V:tM, Mage: the Ascension, or RIFTS
HERO lets me play anything. 3.5Ed is my favorite iteration of D&D. The rest? Each holds a special place in my heart as either a game in and of...