This is my favorite. I like how it's enclosed, the lighting, the shelves. I like the extra large seat. Possible to put curtains around it to close it off from the rest of the room. I also like the multiple windows inside the enclosure.
Bay window seating is a perfect place to create your mom cave. An outdoor view and natural lighting. Read this DIY Mom Cave Article for more ideas http://www.lender411.com/featured-article-diy-mom-cave-on-a-budget/