I like messing with vintage machines. Between my 10 yr old daughter and I we have 4 that see regular use. My wife doesn't sew. I'm in the process of restoring 2 treadle machines, at least one of which will go in the LR to be used when it's ready and we have a few other machines waiting for restoration as well. I think we're currently at 12 machines between us. My goal is for every machine we own to be usable though I'm sure some will see more use than others. I think the only capability we're lacking is a good free arm machine. My daughter prefers sewing clothes and bags while I prefer quilting. We have several machines that do zigzag and decorative stitches though I prefer my straight stitch machines for piecing.
Rodney