I almost never even bother to listen to the voicemail. I figure 1) if it's serious, they'll call back and 2) here's how 99.9% of voicemail messages go:
"Heyyyyyy, it's meeeeeee. I'm just calling to say hiiiiiiii but I guess you're not arouuuuund. I'll call you laterrrrrrrr. Byeeeeeeee!"
They drive me insane. Don't leave me a message saying you called, I have a "missed calls" thingie on my cell, I KNOW you called. Leave a message if you have something to say, like, "Don't call me back, I just had a minute" or "I'm going out of town so I'll call when I get back" or something. And WHY oh why oh WNY does everyone draw out every word in voicemail? Everyone devolves into a 15-year-old girl when they leave voicemail, even the guys.
I hate the phone.