I don't get to play much, as I'm usually the GM, but the PC I have planned is one that's been tickling my brain for the last few months.
Basically, a dwarf that is very un-dwarflike in personality and in his interests. Because of this, he tries to cover up his behaviour by acting particularly dwarfish.
For example, he doesn't like hard alcohol, prefering to drink plain water, but if someone calls him on this, he'll enter a drinking contest - and be the first one out, as he can't handle his spirits. He isn't much of an axe or hammer wielder, preferring to use a shortsword or something. He is mobile and agile and battle, though he describes his technique in very dwarven terms - "I am the hammer that strikes the iron upon an unmoving anvil. And like any hammer, I have to strike quickly, from many angles, to beat the iron into the shape I desire".
He doesn't get seasick, but pretends to when he's on a ship (he actually loves looking at the ocean). He gets just a touch claustrophobic in caves. He finds elves to be pleasant company (but of course doesn't let them know this). He is not much of a craftsman.
His big dwarf trait is that he's incredibly stubborn. If he thinks he's right, he'll stick to his guns, and complain incessantly if someone goes against him.
Oh, and my favourite part - he tells everyone he hates horses. He comes up with all sorts of reasons on why they are the worst animals in the world. He kicks them, but always seems to miss. He curses at them, and comes up with the most demeaning names possible for them. And then, of course, when no one's looking, he feeds them, brushes them, and treats them like children - he absolutely loves horses, and is very ashamed at this fact.
I think he'd be a fun character to play.