That's the thing. When I had data... I would be out and about, but my face would be looking at my iPhone trying to read all the newest news articles, keeping up with MacRumors Forums, Tweeting about my stupid life that nobody cares about and emailing my girlfriend. All of that activity took me away from what I was really supposed to be doing. Now that I've gotten rid of data, I can live a more meaningful life outside of my apartment. I can talk to and interact with other people, be involved in what's happening around me and just enjoying life without my face looking at a gadget.
I felt the constant need to make use of all the features of this expensive phone because I was paying too much money for it. Now that I'm not paying much anymore, I don't feel bad when I don't use it for a week straight. The decision helped me get along better with my girlfriend too. I'm a much better person now because of it. It's too easy to get distracted with the iPhone. I couldn't just let it sit there and be a "just in case" thing...