I think sewing machines can be as much an addiction for me as fabric! I currently have 10:
2 Husqvarna Vikings, a Designer 1 and a Scandinavia 400 (both combo machines)
1 Brother PE-700 Embroidery Only machine
1 Janome 204D Serger
1 1974 Singer Touch N Sew 758 (bought for the huge cabinet, but it's my favorite piecing machine)
Those are the sewing machines I use the most. I also have:
1 Singer Tiny Serger (that has serged countless yards of needlework fabric)
1 White 970 (my first brand new sewing machine back in 1995)
Both of these I keep for sentimental reasons :-)
I got interested in antique machines, so I have:
1 1918 Singer Redeye Treadle (my pride and joy)
1 1910 White Treadle (with the wooden box on top) I know the lady's granddaughter that owned this, & am searching for a proper home for this one-owner machine.
1 1961(ish) Necchi Miranda (waiting on new wiring but runs great)
Whew!