I wanna do a serious (boyish) layout, but all I ever buy are fun bright things. I'm looking for something with a lot of black, other dark colors, not too girly, etc.
I have 4 boys, none under 9 and so I don't do cutesy anymore. I love Traci's kit linked above -use elements from it all the time. I also just bought her new kit Blue Skies & Flutterbys (don't be scared off by the flowers and butterflys, this is a serious boy kit that I've already used a ton - check my gallery!)
Another good one is Man of the House by Eva and Kristin:
And Eva's Hullabaloo has some bling in it, but gorgeous papers that make great boy pages:
Just one more...Libby's Saturday in Dentention has great boy colors/elements too: