It does make a difference, having a dedicated work space. I've struggled to maintain one before, because I've always set up my desk in spare rooms or little office spaces, and then found myself migrating through to the kitchen table or the living room. Now that I have a desk in the main living area, however, I'm finding it much easier to focus. The cats like it, too - it's right behind the sofa, so they can spread themselves out along the back of the seat and glare at me while I work. Kind of a hobby of theirs.
I suppose I like being in the centre of things! (And close to the fridge?)