Michele, it's your house and the decorating police will not come to arrest you if you do whatever pleases you. This room is separate from the others and that gives you more leeway to do what you want. You just need to figure out what colors you do like other than plum, and whether you want plum walls or carpeting and/or furniture in that color. Google "purple colored living rooms" and then click on the images. I really like purple with yellow, which I wouldn't have thought of on my own. It's a great combination in spring flowers, so why not in rooms?

What color did you paint the walls? For walls or for bedding, I'd go with ivory or light beige, being careful it doesn't look yellow, not stark white. White might make the black furniture look harsher. Even though apple pie always has very good advice.

what colors and styles do you like? how many use daily? what do you do here?

This is what the living room looks like