Having looked through the “What’s hot” feed, the algorithm seems very heavy on memes.
It’s much less political than Mastodon, and there’s less journalism. Not as much hobbies either.
Right now, the culture seems to focus on inconsequential stuff. Which is fine if that’s what you’re into.
One thing Bluesky has that Mastodon doesn’t is quote posts. People use it a lot.
Here’s also a good time to remind people that other Fediverse server software—like Akkoma, Friendica, and Calckey—support quote posts.