I like the states that have outlawed having both THUMBS off the steering wheel at any time! That is one smart rule. They are trying to get people to stop texting while driving, for which there is NO excuse.
My son gets annoyed because I won't always answer my phone; I get annoyed because he usually won't leave a message. He usually doesn't want anything important, anyway....so there you go. It's the old "mother vs. son" standoff. He'll leave a message when it's really important. I think we've had the discussion in here before about kids (usually in their 20s, that I know of) not leaving messages when they get the voicemail. I just don't get that mentality, but it seems to be what they do.
I have to admit that I do respond better to a text message, but it will be when I get around to it, as opposed to immediately upon receipt. Snotty Me!