Here's something that, with the inclusion of the Passive skills, I'm not sure about:
When do you ask PCs for a skill check? Any skill check?
Do you:
Ask them when it becomes relevant? ("There's a symbol on the door. Make an Arcana check.")
Ask for them only when the PCs prompt you? ("Can I make an Arcana check for the symbol?" "I want to use perception to watch all around us.")
When do you ask PCs for a skill check? Any skill check?
Do you:
Ask them when it becomes relevant? ("There's a symbol on the door. Make an Arcana check.")
Ask for them only when the PCs prompt you? ("Can I make an Arcana check for the symbol?" "I want to use perception to watch all around us.")