Do good power cords have to be stiff?

@stereo5 The 7 gauge Pangea is ridiculous- had one years back. 

Unless your equipment is very poorly designed, I don't think you should be able to tell any difference between any power cords, assuming a decent construction baseline.  I can't tell a difference in my system, and the only blind test that I know of confirmed my experience by a guy who has a million dollar system. . . But buy whatever you think will work for you. . .

Shunyata makes excellent power fiords and the have an EF (extra flex) version that works very well

When I drink too much whiskey my power cords get limp. Has anyone else ever experienced this phenomena?