Right, most of the time "I think" is a waste of space. I sometimes say explicitly when I'm on the fence about an idea ("Mild preference for A because __, thoug

Right, most of the time "I think" is a waste of space. I sometimes say explicitly when I'm on the fence about an idea ("Mild preference for A because __, though B would be ok"), or if I feel like my currently viewpoint isn't well-considered yet, to encourage others to read with a critical eye -- otherwise the polite default is often to go with the flow if there are no obvious or serious problems, and that can be bad.