I really like Mastodon, so much so that I have several accounts for different purposes. You do need to invest a bit of time into following a good number of people who post stuff you like, though. I was pretty active on Twitter and now I'm pretty active on Mastodon and I like Mastodon better, but I had to spend a little time searching hashtags for people posting cool stuff.

One thing that I haven't seen anyone mention is moderation - your experience will be better with a well-moderated, well-run server, otherwise you'll have issues with spam and maybe worse. Generally a medium-sized server based around a subject of interest or a geographic location works well, where the admins are actively involved in the community.