Tough question. It changes depending on the situation. My favourite colour for painting a room wouldn't be the same as my favourite colour for a TV/stereo/car etc. I do a lot of graphic design/logo creation and different themes require different colours, whichever I'm using at that point in time becomes my temporary favourite. If I was pushed for an answer I'd probably be torn between orange, neon/electric blue or yellow... orangey yellow, yellow just before it turns into orange
I always prefered green. Lately however I seem to be more fond of silver. Since there is not silver on the poll, I'll choose green. Accidentally voted black by the way.
Black is the absence of light, whereas white is the combination of all light in the visible light spectrum.
Black and white can both be refered to as colours in practise. No one's going to stand around arguing what colour a black cat is.