Words reveal a lot about a person, the written words even more so.
In this age of the email communications, I guess its got more to do with characters than words. So very literally each character you use (or skip), ends up reflecting your own character :)
What I have observed that people who tend to use acronyms (FYI, BTW, TC, CU, v.good, :) etc. )extensively are more likely to be of the 'Minimalistic' types as opposed to the 'Elaborate' kinds who tend to write full bodied mails.