Depends on what you’re looking for. Each instance has a general vibe of user, so while .world may be good for someone, .ml may be good for another, and beehaw.org may be good for another, and so forth! .world is generally a generalist instance, but ironically because people with more specific interests are already on more specified instances, .world is more likely to house people that don’t fit well into other servers, paradoxically creating a type and it’s own unique vibe.