When I tour older homes, many times I will notice some sort of addition or bump out has been added to a home whether the owner needed a little more elbow room to entertain guests or to create an area for working, reading, or crafting.
The important thing is to carry the style of the rest of the home into that space to give it the seamless appearance that it always belonged with the home. Add some character or charm to the space by incorporating fun lighting fixtures, and pops of color whether it be in the form of accessories, artwork, or bringing it to life with some indoor plants.