In an ideal world, you'd...boil water for your morning tea, cook a baked potato for lunch and heat up a frozen burrito for dinner.
In reality...you really only use it to warm up your coffee (which unfortunately doesn't taste very good). We know some people are going to keep theirs no matter what, but considering the space they can take up, microwaves' usefulness is debatable. As anyone who's tried it knows, nuking dinner can be hit or miss, since food cooks from the outside in, so it's often overdone on the edges but still cold (or worse, raw) inside. Try traditional: Reheat food on the stove in a nonstick frying pan, and defrost containers of sauce or soup by sitting them in a pot of barely simmering water. Microwave popcorn isn't only bad for you, it's not so hot for the environment either. You're better off making it on the stovetop instead.