For me I just don't want 'this' to be my life anymore. I've been overweight my whole life pretty much and ballooned from a size 18 to a size 26 when I left home. I lost a bit and maintained around a size 20, then that crept up to where I am now at size 22/24. I use sizes because I didn't weight myself for years!!
I sortof put my life on hold and always said I'd do things when I lost weight - be it boyfriends, holidays, or whatever. Then I woke up this year and realised I've been wishing my life away since I was a teenager. I hit the big 30 next year and I'm stuck in a an unhappy place that I don't want to be anymore. I've watched guys I've been interested in meet and marry their wives and go on to have babies, all whilst I was sitting at home chomping my way through a box of donuts or chocolate cookies.
Also, being slimmer is something I've thought about EVERY day for the longest time, and it really is now or never for me. I don't want to wake up 39 and wish I'd done it ten years ago because I already feel that way at 29

Losing weight is a choice I make every day and I choose a better life for myself