OK, I hereby confess that I have a new Bernina 8 series machine. The one that has an 11 1/2 inch harp and is referred to as a 'sewing computer'. It is nice to sew quilts on because it secures the thread at beginning and end, and then cuts the thread for me. The tension on it is wonderful. And the store had a cutaway machine, and guess what- it is all metal under the plastic.
With that said, I swap freely depending on what I am doing. Right now all sewing is being done on a Pfaff 130(as I am doing leather). Heavy quilts get done on either the 201 or Morse IV depending on if I need more than straight stitch. I have a stack of others that are awaiting repair or repaint.
I am 54 but love a lot of things that are older than I am- Sinatra for instance. I see the vintage machines as having a wealth of experience they can whisper to me.