I love my sewing space in the basement. When we built the house, we had the builder put in two 3 ft square windows in the southwest end, and there's a standard little basement window on the W-n-w side, so I have some pretty good natural light. Then we added a great number of florescent shop lights, a piece of carpet, some old but not dead storage pieces, and couches and a TV and radio. My old dining table which is huge is a perfect work place for cutting and whatever. I love the floor for making the quilt sandwiches, and laying out big stuff my design wall is too little for. Since my personal themostat has changed so much, I am quite comfortable down there in the summer, and it doesn't take much more than some sweats or a sweater in the winter. I can walk away and leave it, and no one's the wiser!
I do want to get busy this summer and finish painting the walls- my arms got tired before completion, add a way to hang my quilts for decor (most likely a board near the ceiling that I can hang things from,) and redo my improvised curtains into something a little more workable.
I do love it down there!