When I was in high school, I used text shortcuts a lot because that's how my contacts texted me also. I used shortcuts specially when I'm typing long text messages. However, since I started studying in college I have been using proper English whenever I text. I have been conscious of using upper & lower cases, punctuation, spelling, etc. This is mainly because I was studying Bachelor of Arts, Major in English back then. And now, it bothers me when I receive text messages with shortcuts. It's like an eyesore to me!