There's really no reason not to have a monopod. Truthfully, I mostly use mine for non-photographic purchases; having a 6' adjustable pole really comes in handy around the house. I keep it by the couch for when things get stuck underneath.
I have an aluminum Manfrotto with a simple tilt head. It doesn't have a quick release; instead it has the old school thumb screw which I actually prefer. I wish more modern tripod heads had this option.