Been wearing them forever.
Can't stand glasses. I think I have better than average peripheral vision, so glasses make everything around me blurry.
I have been wearing disposable daily wear lenses for over a year now, and can't imagine ever going back to 30 day lenses.
I keep extra sets in hiking bag, range bag, glove compartment, etc. They are a bit more spendy, but nothing beats putting on a fresh set of lenses every day, and I guess I save a little by not using cleaning solutions.
Sleeping with them on is a bad idea. As Aloha said, your eyes need oxygen. Take out your contacts at night before reading or watching TV, and let your peepers breathe for a while.