Here are some suggestions for bastions and special facilities that fit certain play styles.
Battlemaster
Wants to improve their own fighting abilities.
Meditation Chamber
Menagerie
Scriptorium
Shrine
Smithy
Stable
Training Area
Arcane Blacksmith
Crafter
Wants to be able to craft things.
Alchemist's Lab
Smithy
Workshop
Arcane Blacksmith
Witch
Entertainer
Wants that bard life.
Gambling Hall
Pub
Theatre
Musician
Spy
Tailor
Herbalist
Wants to brew potions, poisons, and the like.
Alchemist's Lab
Garden
Greenhouse
Witch
Hunter
Focused on hunting or taming creatures.
Guildhall
Menagerie
Trophy Room
Hunter
Holy Person
Focused on faith and the divine.
Greenhouse
Invocation Chamber
Library
Observatory
Portal Conflux
Reliquary
Sacristy
Sanctuary
Sanctum
Scriptorium
Shrine
Scribe
Investigator
Wants to use their bastion to uncover secrets and learn about the world.
Invocation Chamber
Library
Observatory
Pub
Rookery
Trophy Room
Mage
Is a spellcaster and looking to enhance this.
Arcane Study
Alchemist's Lab
Archive
Invocation Chamber
Library
Observatory
Portal Conflux
Scriptorium
Teleportation Circle
Scribe
Witch
Money Maker
Wants to make money.
Gaming Hall
Pub
Stable
Store
Miner
Political Schemer
Wants to be part of the geopolitical affairs of the world.
Guildhall
Library
Prison
Pub
Rookery
Teleportation Circle
War Room
Commander
Spy
Tailor
Diplomat
War Lord
Wants to have an army and enhance their own and their retainers' martial power.
Captain's Office
Guildhall
Rookery
Training Area
War Room
Commander
Miner
Diplomat