IMO there should be valour for winning side and losing side, two separate ones instead of this Everybody thing.
As for seddrik, I find that the character I get most valour on is an agi 1h. Every hit gets me plenty of points, like 10 points per kill. I kept getting valour and I was in a gambeson, leather gloves, with a liuyedao. And that's it.
But strength characters? Totally get less points per kill (ownedbitchdominated)