Sharpie pens are great if you are looking for that "marker" or "felt tip" feel. I don't find that these pens bleed through the paper, unless the tip is help in one place for a long time. I would recommend the fine tip version, because of personal preference, especially if you are looking to write intricate (math or chemistry) notes with them. Otherwise, a wider tip may be preferred. These will go dry if you forget to put the cap on, but I have found you can rehydrate them (to an extent) with water.