1. Writing style change
2. Degree of extra/reduced fluff
3. Degree of typos
4. Typing style change (e.g. using semicolons a lot, misusing commas consistently, conventions like S.O.S vs. SOS)
All in an effort to further anonymize your text. The idea is that people have different, consistent grammatical habits and mistakes, writing, concision, etc. You create a "profile" for each identity you want, usually one per account.Another interesting concept to explore is platform style. Have you ever noticed that everyone on Reddit sort of sounds the same? People on HN sort of sound the same. I think there's an emergent platform-based profile that top comments hover around, because adhering to this style is more likely to get upvotes. The hive mind is real!