As said in the title, what's your favorite named character based on their fluff? (not rules)
For me, Colonel "Iron Hand" Straken. He's been a favorite of mine since I printed out and read the Codex Catachan from the GW site a while back. His whole tirade at the battle of Moden's Ridge always makes me laugh, favorite line being "Medic! Stop your whining Brook you've still got another damned leg!"
It's just his bombastic, balls-out attitude and gung-ho nature that makes him my favorite. He's like a bunch of action-movie heroes rolled into one, plus he's a tough ol' *******. That's why he leads my army.
That all said I wish the new model had been like his picture in the new codex, where he's holding his shotgun with both hands and stepping forward. Hard to describe but it's a cool picture.