Congrats on your progress to date..we have similar stats and I know how hard you must've worked to get those first ten off.
As for the changes in your habits, I can relate. This go-around is probably the first time in my life I can honestly say I've committed to losing weight. When making decisions on food, exercise etc I can see my goal in my mind and that makes it easier to stay on track. I guess before deep down I knew I wasn't giving it my all.
Keep up the good work!