I use different interconnects, depending on application: Cardas, WW, Kimber, DHLabs, Tara Labs, and something I'm sure I'm forgetting.
Speaker cable - Dunlavy
Power cords and accessories - all DIY
I gathered a bunch of interconnects when I worked in the business, most were freebies, and that's what I use to this day. The speaker cable was a bonus of sorts from the manufacturer, as were the silver Music Meter jumpers. AC-wise, I look for interesting wire and work from there. A few of my past efforts:
