Well this one took off - I guess catharsis is a good thing, here's mine:
I'm addicted to the teletype-induced Unix shorthand, that is: rm vwls, and I get all OCD about my variable names being the same length to make the code look pretty at the expense of readability. Four character names (without vowels) seem to be my favourite.
Luckily my PoCs tend to get burned down by professionals before production!
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