Colin Farrell has totally changed his bad-boy ways. The former party animal turned devoted dad reveals that he gave up drinking so that he could focus on his acting career. "I just wanted to stop. I was done with it, I was tired of it, I wanted to get off the treadmill," Colin tells Total Film magazine. "Giving up alcohol has put more focus on my career. I'm a lot more appreciative over what I have," he admits.