Out of curiosity, I'll be posting world seeds here that I find interesting or fun. Idk how long I'll keep doing it though, and disclaimer, most if not all of these are seeds that were tested on a generator site instead of in-game. Post your favorites in the comments too and let's start some adventures! Here are a couple I found noteworthy.

SEED: Pointbreak
Unfortunately "Strongest Avenger" doesn't fit into the character limit of seeds, but this one has most of the biomes contiguous to the spawn meadow, so you don't even have to build a boat for most of the content! There are convenient water channels to facilitate quick travel though, such as from the spawn meadow to some swamps and plains. Lastly, there are two small islands South of spawn that could be good for hunkering down against events, if that's your thing.
View here[valheim-map.world]

SEED: Papameat
Meatcanyon-inspired, cursed world gen. On this seed you can almost walk from North pole to South pole from spawn. Some sailing required, but not much.
View here[valheim-map.world]

Honorable Mentions
"Braindead" and "jerma", which do not seem like particularly fun seeds, but they generate strikingly similar maps. Maybe that's of interest to you math nerds, or Jerma haters, either or.