When I joined, it felt like a good way to meet people who share interests and learn about new ideas.
You kick-start your social graph by looking at the fediverse feed and following people who are cool and interesting. You also can find good discussions by commenting on their tweets (I'm not calling them toots).
I left because it eventually became the same drama you find on Twitter.
Anger becomes a hobby, and negativity then spreads like cancer.
People ruin other people's reputation and lives within a community (or real world if they can) all because of a single second of their life that may or may not have happened.
It is very sad and alarming that people are blind with unguided rage that they do not know how to direct positively.
In the end, Mastodon will be a good community, but not for everybody, and it is not an open or welcoming community.