The make and model of your guitar(s) and/or other instruments and gear.
Breedlove Pro, Breedlove ADRS, McPherson D9CE, Dean Traditional Reso (Style 0), Recording King Tricone, Goldtone Maple Magic Banjo, Stradolin A style mando (1930), Mike Kelley Dragonfly mando, Trinity Bouzouki, no name Koa tenor uke, and lots of other stringed toys. I also use Yamaha, Kurzwiel, and Roland keyboards.
Kerry--Let me know when you're gigging once it starts to warm up--Kenosha's only a couple of hours from where I am (depends on construction on I-94). Any suggestions for a good beginner's mandolin? I've been listening to way too much Grisman/Garcia.