One thing I like about guitars and other musical instruments and accessories like amplifier heads is that they allow you to be creative. You can sit on your sofa and watch TV, but it is a better idea to spend your time in a more creative way like playing a guitar for example.
As a person who knows a thing or two about playing guitars, I know that playing one can give a lot of satisfaction. You get to learn new things all the time and you are constantly improving.