I don't know why anyone 'likes' anything on Twitter. If I like something enough to signal I like it, I'll retweet it. If I don't like it enough to retweet it, or don't want people seeing that I like it, then I shouldn't be clicking the button anyway. My likes were essentially my bookmarks for a while, until they actually introduced the concept of bookmarks. But that's still a little clunky, so I use a combination of both. Not super worried about my 6 followers. When you have a large Twitter presence (as Chris Myers does), I assume you know exactly what you're doing. Most of my likes have been accidental, for what that's worth.