I also quote old movies, like Clue - "So he says, but does he know?" and "but look what happened to the cook."
It's really amazing how often the opportunity to use things like that come up IRL. Not so much online. But one of the 'requirements' of my coven is that you have read everything by Douglas Adams or at the very least have watched lots of Monty Python. Not for religious reasons but so you can keep up with us when we start tossing around one liners & quoting things.
My own personal voice includes the work 'freaking' which is said in place of the less appropriate F word. I use a lot of contractions, drop final 'g's and have an accent in certain vowel sounds.
I don't tidy up my voice when I am writing very often. Usually just for clarity. Journaling is more thought than spoken word & there is a difference for me in those 2. I have a much larger mental vocabulary than spoken one and mentally my grammar is better. However my though process tends to ramble, whereas I am much more concise verbally. So often when I am journaling for a layout I will lean more toward my spoken voice than my mental voice. When I am journaling here I tend to stick with my mental voice - which should be obvious from the rambling nature of this post.