+1. Giving users the ability to choose a thumbnail should be high on Evernote's priority list. The view that shows thumbnails is the default view; browsing notes by title, thumbnail, and snippet is the default behavior. For those reasons alone, being able to choose the thumbnail should be super important. The current algorithm works sometimes, especially when there is only one or a couple images in a note. But in other situations (for example, when clipping online tutorials which have illustrations of all the steps), the preselected images are nearly worthless. I have noticed that in certain situations Evernote will pick a different image each time you edit/save the same note. But it doesn't always work to let you choose the image that you prefer. And when it works, it's just another hack to do something that should be as easy as right-click, "Make this my thumbnail".