I agree with so much of this, and as we all know, the most powerful chapter of Space Marines are the "Angry Marines"...
You've got to respect a marines chapter that actually have a dedicated device called the "angry marine launcher", that's specifically for hurling one of their fellow marines at the enemy (middle fingers at full extension all the way) solely for the purpose of getting close enough to use their POWER BOOTS TO KICK THE ENEMY TO DEATH!
http://1d4chan.org/wiki/Angry_Marines (!!!LANGUAGE NOT SAFE FOR WORK!!!)
Originally just a passing joke among the 40k community, they actually have a full, albeit unofficial, Codex now! Download it some time and it's well worth a laugh even just for the fluff... Definitely not safe for "little eyes" but the game is really meant for grown-ups anyway.
From a game-play perspective, they are akin to a gaggle of blood angels all having a simultaneous nuclear meltdown. Simultaneously hilarious and terrifying... for both sides...
If you can make it through that article without at least a snicker, you should be checked for a pulse!
And one should not forget the Titan Legion (Legio Iratus, IIRC) and the Sister Of Battle version, (Sisters of the Crimson Tide IIRC) that can join them in battle.