Since the carpet came with the house, presumably you don't know what's under the carpet. There may not be a wood floor under there, but plywood, and you would have to put down a floor. In any event, how do you like your
wood floor? If it's perfectly okay for you, get the wood floor. If you're unhappy with it, get carpet. I like the
feel of carpet under my feet because I have a tendency to take my shoes off. A suggestion might be a wood floor and an area rug. I have a wood floor and an area rug, and I like it a lot. I don't see that it makes a difference as far as sewing is concerned, only cleaning up. I don't find a difference between seeing items on the floor on the wood floor and the carpet. I see them both equally well. My point is whatever is comfortable for you is what you should get.