The first Adventure I played, as a player, was the AD&D 1e Temple of Elemental Evil, and the first adventure I ran as a DM was the Keep on the Borderlands.
While I've no particular desire to play/run those adventures again, I'd like to run old school adventures like "Treasure Hunt", "Rahasia!", "Dragonlance Classics" modules, with modern systems, like Pathfinder 2e, Level Up! Advanced Fifth Edition, or Original 5e Dungeons & Dragons, or with quasi-osr systems as Castles & Crusades.
i'd like to recapture some aspects of the feel and the style of those adventures and of the OSR gaming (for instance players' skills and wits along and over characters' features, and rulings over rules, in some cases) blending them with more modern rulesets, which I prefer.
Two of the best adventures of BECMI era which I'd like to run again are "The Curseof Xanathon" and, above all, "THE CROWN OF ANCIENT GLORY", an adventure which I really adore, and that is very dear and close to my mind, memory and heart, both for gaming and personal/emotional reasons.
Personally, I don't like the lethality of the earlier adventures and rulesets. Neither do I like he extreme power of PCs in more modern games, but Pathfinder 2e and Level Up! Advanced Fifth Edition, and also Dungeons & Dragons 5e, with some optional rule from the DMG, all hit my personal sweet spot. Personal preference, of course.
Happy life and happy gaming!