I'm on my third trip from 270+ to 230...
The first time, school and work (6a-11p + 1hr commute each way), interrupted my progress and I gained it back.
The second time, divorce and riding in a semi for 6 months did wonders for my weight gain.
I'm hoping that I can hold it this time, but my reasons for losing are different. Most everyone who has lost weight has put it back on at some point. Now is the time to start correcting whatever is causing it.