There are quite a few concepts I've been wanting to try, since I normally only get to DM.
A proper horseman in the vein of the Rohirrim; specifically, he'd have several horses with him - a light riding horse for general use, a heavy warhorse for planned combat, a pack horse for stuff, and likely a few extra horses so none of his mounts gets too tired form carrying frequent weight. He'd also use several types of armors in the same vein - none for travel in civilized areas, perhaps a chainshirt when ready for, btu not expecting combat, and full plate for the pre-planned skirmish. I don't think I'd specifically go for a knighthood, but wouldn't rule it out depending on how the campaign went.
A vanilla dwarven fighter. A simple-goaled fellow - uses his axes to kill monsters and loot their lairs, hoping to collect enough to retire and run a brewery. Nobody in my gaming group plays dwarves, and I've never actually played this archetype.
Astereotypical paladin. This was moreso an idea for a whole campaign on of the other DMs was thinking of running with three of the players playing paladins, and I've kind of maxed all the ideas together - one paladin was going to be a drunk, one quite promiscuous, but I don't quite recall the third. They'd all be Lawful Good and follow the generic paladin code in the Player's Handbook, but would be "flawed" in some way that didn't violate the code - for example, the promiscuous paladin would flirt (and possibly more) with many and varied women, but he'd treat them all with great respect and not as conquests, and he'd always be upfront about his plans, never lying, etc...