I'm 52, and biking tights make me look smoother and better than without them. They also feel great when you're biking, and you can get them with chamois padding- another plus.
An alternative for you might be to wear biking short or tights under sweat pants during the winter. There are some nice polar fleece pants out there with elastic around the ankle, that are slightly loose fitting. Don't get overly baggy pants or they will catch on your gears- instant fall!