What do men think of women who watch their weight as part of their lifestyle?

I'm not a man, but I think most men would find it attractive that a woman takes pride in her body and takes care of herself. Just don't be one of those women who become obssessed with it, and annoying, always complaining about how fat they are, when they are like a size 2. Don't force your veiws onto him, and then I wouldn't see the problem.