How closely do you adhere to the lore in your games?
Is the general expectation in the CoC gaming community that keepers will follow the Lovecraftian lore laid out in the rules/setting books closely, or is it expected/accepted that keepers will alter details to suit their need?
My instinct is typically to treat the lore as a source of inspiration and change details that don't interest me. For example, I'm not particularly invested in having supernatural phenomema always be related to Lovecraftian/cosmic horror entities in my games.
Or, I might include Yithian related body-switching plots, but since I don't enjoy time travel I would probably exclude that aspect of the lore.
I'm wondering whether or not adjusting the lore as a keeper is simply "not done," or if doing so is pretty typical.