Like Diaglo I started with the slightly off-white original edition, Unlike Diaglo I prefer the newer editions. (I started off as a wargamer, but did not try out Chainmail until after I had D&D.)
From there to the Holmes version, then to AD&D (both editions).
Least favorite (aside from wht happened with 2nd ed... 2nd started off fine, but toward the end it was pretty bad) was 1st ed. a whole lot of rules that I ditched right off the bat. Weapon speeds, bouncing lightning bolts, different spell ranges inside and outside, armor penetration modifiers that had nothing to do with what the weapons could actually do...) Some of these I continued to ignore under 2nd ed.
I still use a few elements of 3.0, but for the most part I am at home with 3.5.
The Auld Grump