I like Libreoffice. It's simple and we can done the work as we should. But, it's my opinion that it isn't "visually user friendly"... I've seen some interesting mockups very cool indeed. However, as i'm use it sometimes all day, maybe Libreoffice team should takee care some other important aspects like design. It's important though, at the moment Libreoffice it's similar than office 98 :D in terms of design and we are in XXIst century. Have you seen Apple's Keynote for instance? It's simple, beautifull and visually friendly!
Let's think about that.