List a few if you'd like. What items are D&D to you and hence should be considered for 5E?
Take into consideration coolness factor, best thing that ever happened with said item, etc.
It's hard to pick a favorite, but I'd have to go with:
1E Vampiric Ring of Regeneration
for a Fighter, I could fight all day with it.
2E Daern's Instant Fortress
a safe haven for the night and Knock no longer affected it. My PCs can overcome a lot of challenges as long as they are rested, but getting attacked while asleep just plain sucked.
1E Cloak and Boots of Elvenkind were up there as well for coolness (3E and later editions, meh).
Take into consideration coolness factor, best thing that ever happened with said item, etc.
It's hard to pick a favorite, but I'd have to go with:
1E Vampiric Ring of Regeneration
for a Fighter, I could fight all day with it.
2E Daern's Instant Fortress
a safe haven for the night and Knock no longer affected it. My PCs can overcome a lot of challenges as long as they are rested, but getting attacked while asleep just plain sucked.
1E Cloak and Boots of Elvenkind were up there as well for coolness (3E and later editions, meh).