Also, my language is different online. I tend to use simpler words in real life partly because I have to think faster and partly because I have to speak faster. Online, I can take my time and so I have a broader vocabulary online than offline. Also, there are things I could never say offline that I can discuss freely online. That, and there are some words I only ever use in one context or another. One of those being "y'all." I never say "y'all" offline, but I use it sometimes online.
I think if the Internet ever gets to a point where 99% of people interact online via video or audio, I'll be in the 1% still stubbornly using text interaction like a stubborn old coot, because text interaction online is freedom for me: freedom from my offline limitations.
Unrelated: *Giggles* This page uses military time, and right now it is 23:23. An auspicious time indeed, milords and miladies. (Ah, archaic speech and other quirky manners of conversing, another thing I do online more than I do offline.)