I have collected over 30 machines, but use four the most. My favorite is a 201-2 for normal sewing, a 15-91 for heavier stuff and my Barracuda 2000 for canvas. My most recent work in progress is a treadle Red-Eye 66. Oh, yes, I love fiddling with the 29-58 when warranted. My most recent project for it was a smartphone belt case of leather. Any excuse to use the 29 I jump at.
As to quilting, I've not officially quilted but have made two blankets with jean patches with my GDaughters college logo fabric as the underside. Also, have done a jelly roll which needs quilting - maybe some day when the collecting of machines and refurbishing itch is scratched.