Do you design PC boards? If so, what tool do you use, and why did you choose it?
I don't design boards per se, but I've designed some simple circuits before and built them on pieces of prototyping board. I've used iCircuit for sketching and simulation, mainly because it seemed to have a gentler learning curve than the alternatives. At the time it didn't support many component types though. KiCad seems interesting - should I ever need to make a PC board I would probably try and learn it.