I own a 2007 Chevy Malibu. It's nothing fancy, but it's got me where I've needed to go. And it's been remarkably reliable. Besides oil changes and a few minor repairs, I've not had to put much money into it - and it has over 150,000 miles on it. I've felt fortunate.
Your bad habits are putting your life, your health, your career, or your relationships in jeopardy. You know they're there, and you want to get rid of them--but you also know from experience that it's just not that easy.