I have my Bernina 1260 for my workhorse and my 1130 as a backup. Also a Bernina serger, Bernina Deco500 embroidery, a Brother, A Janome 6600 for quilting and a Gem for classes. I also have my GM's Centennial featherwaight which I haven't used yet.
I don't think that's too many since each has it's purpose and since I'm retired and live alone, I can sew every day to my heart's content.