I use what ever fabric "fits the bill". I don't seek out older fabrics, but I certainly have a few in my stash and if one of those choices fits the quilt I am making, then I use it. From time to time I wonder if the older fabric is better or worse than what is currently being produced. I use my eyes and my fingers to let me know if it is quilt quality and worth of my time and efforts.
I tend to lean toward reproduction prints such as 30's and Civil War. They just catch and hold my eye but I use what fits the pattern and if making for a specific individual what will please the person who will be getting the quilt.
Back to the question, Yes, I use any vintage fabrics in my stash.