I used to have a large blank calendar style one, but my family kept knocking it off the wall, lol, so I switched to a paper desktop calendar instead. I do have a small magnetic dry erase board I use on the fridge, though, for jotting down grocery items or listing out the week's meals so I can end that "What's for dinner?" question, lol. ;)
What do you use to clean it? I used to use alcohol and a cotton ball or tissues to clean mine, since I found that worked better and was less expensive than the special dry erase cleaner and eraser.