I have to confess that I don't really have a favourite colour combo as it depends on who I am making the card for and also the mood I'm in! But I am quite partial to red, white and blue for male cards.
So this is what I used for this week's new challenge over at Cardz 4 Guyz. The papers are from an old Simon Says Stamp kit which I thought worked beautifully with the SU stamp. There's lots more inspiration over at the challenge blog from my teamies. I look forward to seeing what you make.