Style quirks

Style, usage and other quirks of written expression might be useful in profiling a dreamer.
I'm currently building at a collection of usage features that I'm are identifiable using regular expressions.

Past vs present tense
Use of contractions
Emoticons
Repeated letters like "Ooooooh"
Repeated punctuation like "!!!???"
All capitalized words
Use of Latin: "etc, i.e., et all"
And a few grammatical errors

A number of these boil down to formal versus informal usage. Some quirks are, I think, rules that the dreamer internalized that could reflect social background, age, education, etc.

Use of present tense tends to increase with age.
Someone who uses two hyphens for a dash or puts two spaces at the end of a sentence, probably learned to write on a typewriter.
Use of emoticons, all uppercase or repeated sequences of letters or punctuation point to familiarity with the internet.

I'm thinking about a two-way scale for formality-informality/modern-old fashioned. A negative evaluation of these scales suggests terms like stuffy, fussy, sloppy, lazy, maturity, childishness, conformity, anarchy, etc.

Most of the expressions are paired so the scales could be the ratio of each match. Then sum these for pairs of expressions of the same scale.