Is an author ever 100% satisfied with his/her work?

I swear, you spend a day, a weekend, a month, writing a scene, a page, a paragraph. You re-write it several times. A friend, proofreader, or editor chops on it. You fix everything, you get it just right, and a second after you drop it in the mailbox, or hit the 'send' button, you think of something you should have done to it! I guess it is all part of the process, because I don't think a writer SHOULD be 100% satisfied. One should always be seeking perfection in their work. Geez, you'd think I hade been watching too much Tom Cruise in The Last Samurai, or something. Anyway, if any of you have a similar story you'd like to share, I like to hear it.