I like to write in all lowercase, especially when messaging but also in emails. I like the way it looks and to me it’s become somehow more personal, more like talking in person while writing properly with caps is a bit more formal. I’ve seen a lot of people who do that, even for the main text of their blogs. I didn’t ask very often but the couple of times I did they didn’t have a specific reason for it. I wonder if any of them knew that we were perpetuating a design hallmark of the Bauhaus movement brought on by Herbert Bayer? Probably not many. I sure didn’t.