I use texting a lot.
I get unlimited minutes and unlimited texting. However, it's a lot easier to text someone and say that you're on your way rather than call and have to go into a long conversation when you're going to see them in a few minutes.

As someone who doesn't like to talk on the phone, text messaging is perfect.
At work I can keep in contact with friends and family without interrupting my work. Actually, it keeps me smiling during the day because my cousin and I message eachother back and forth while at work. We work the same job, just different locations.

My old phone was a prepaid phone. For some reason, I was still able to text without having any minutes on the phone. So basically, I was able to keep in contact with people for free.

For those that pay for each text/minute on their phones, it's generally cheaper to text.