I wouldn't like a 1E DMG published today. It's terribly organized and full of random things that seem to have fallen straight out of EGG's head and onto the page.
However, as an inspirational text, it's amazing. I don't think I've ever used the magical properties of gems table in the 1E DMG, but if I ever need a magical gem (not my thing, personally), I will 100% be grabbing my 1E DMG reprint from a few years ago and going to that table.
And the Gygaxian prose, while not the way I'd write a DMG today (although it helped my spelling and vocabulary immensely, leading to a lot of confused adults wondering how I knew what a "carbuncle" was), evokes a strange tome full of semi-forbidden knowledge better than anything since, even the 3E faux magical tome covers, ever did.
I would like a modern-day equivalent to the 1E DMG as a supplemental work after the DMG. (In fact, that's one of the reasons I have Goodman Games' Dungeon Alphabet and Monster Alphabet, for that kind of inspiration-on-demand.) But I think the main DMG should be a more practical volume.
1E DMG best DMG for the vibe/inspiration.
Not as a functioning game manual imho.
I've never really had any struggle with any DMG so don't really have a favorite.