Honestly rough rules and gygaxian contradictions aside. It was a simpler game that was far more balanced than anything released since. Assuming you left the psionics and Bards out of it. Many hate it because it had less options, many hate it because it was often run in nity gritty games with lot's of death and destruction but not all games were run that way and if you gave out xp fairly and worked out the contradictory rules it was a fairly balanced game. A fact that is often lost when people see the lower level wizard and paladin running with the higher level thief and fighter. They can't get past the modern video games where everyone has the same level. With white wolf, dragon magazine and all the other things you had by the 80's it was also a healthier, younger, happier ecosystem than this middle aged game with it's pot bellied whiney old guys and gals who are all arm chair party leaders and game designers telling us all how much better they can do it.