Levels
Alignment
Hit Points
Six stats consisting of: STR, INT, WIS, DEX, CON, CHA/ (in that order! Get off my lawn!)
Numbers for the above generated on a 3-18 bell curve
Nine alignments
Descending armor class
Fighters, Magic-Users, Clerics, Thieves, Rangers, Paladins, Illusionists, Druids...