Planetes is a science-fiction anime that I really enjoyed watching. It's set in the year 2075 when commercial flights to and from space are commonplace and all the debris orbiting around the earth is causing a problem. A light hearted slice of life with a futuristic setting.
If you're in the mood for some silly, schlocky action with a sci-fi tinge then Dimension W is a solid choice. For the most part it's just the various escapades of a robot cat-girl and a luddite. Also, the visuals are absolutely gorgeous.