I would love to see ranking by era. Some great games are lost down the list because they are not a dmd. I would like to see:
early EM (pre 1950)
EM
Solid State
Alpha Numeric
DMD (ending at 1999)
DMD (Stern Era)
I know that's a lot of categories, but I think the play styles are varied enough to warrant it. Halo is a "better" game than Doom, but they weren't released at the same time.