My reasons for secrecy...whether valid or not...
1) I didn't want people questioning me. "Am I sure I want to have this done???" I didn't want to explain 10 years worth of deciding that, yes, I'm finally ready.
2) I didn't want people talking about it when I wasn't around to defend myself.
3) What if it failed? (I know, highly unlikely) I didn't want people thinking "Wow, she's really got a problem, having surgery and still FAT!"
BUT...with that said, my surgery was done almost 4 weeks ago and I'm not so secretive any more. Some people are noticing and I've just fessed up and I haven't had one negative response. Everybody is very happy and proud of my decision. I am, too. It's all been very supportive.