What are some of the facts that you think are interesting about the artists, works, releases etc. recorded in MusicBrainz? Perhaps the earliest artist in terms of date of birth, work with the most covers, most prolific artist, oldest artist, most tracks in a release, etc.
Are you asking what kind of stats I (and other forum members) would find interesting because you’re planning on gathering them, or are you asking for which stats I already know and find interesting?
Just asking which stats you already know as fun little tidbits.