My choices -

All DMD's 3.

Early SS (late seventies, maybe first or second year of the 80's) 5.

I don't have any mid to late 80's games, but those seem right on 3 balls when I play them, whereas the early 80's games (and before) seem right on 5, although debatable on Black Hole - I have it on 5, but sometimes think it should be on 3. But I'll leave it 5 so when Daniel comes around he'll get to play it more than 1 minute! ;)