My Mom used it a lot in regular sewing. She made my stepdad's t-shirts and finished all of the seams. They looked very professional. When she made my wedding dress and others she serged the seams because that kind of fabric really likes to fray. I really like it to sew denim with mine because it prevents raveling. There are a lot of different things you can do. Somewhere I have a book that I purchased that gave ideas for using sergers. Maybe you could find one or check one out from a library.
My Pfaff that is about 20 years old has several different feet and I can do quite a few things with it.