Another vote for Postgres. MyISAM is a joke for serious use, and InnoDB isn't better/faster than postgres in my experience. Postgres has felt much more mature

Another vote for Postgres. MyISAM is a joke for serious use, and InnoDB isn't better/faster than postgres in my experience. Postgres has felt much more mature and more focused on delivering things you'd expect in a real database (FKs, etc..) for a longer time.