If you watch with it in mind, the fact that this is a movie about a family of dwarves and their hired help becomes hilariously clear, as well as giving you the real reason for Thorin's claim about loyalty at the beginning.

They don't harp on about it, but the Longbeard cousins are consistently more stern, serious, and considered warriors (albeit 'old warriors'), whether it be Thorin's stoicism, the obvious importance of the Sons of Fundin, but also the skill and respect of the Sons of Groin - they're so tight with their cousin Thorin they're willing to pick a fight with Elrond's folk.

Thorin tells Gloin to 'get a fire going' multiple times, and it's Oin and Gloin who factor the prophecy and discuss the ravens and thrushes at the end.

There's a lot to like about the other two merchant/tradesman class families as well - Bofur was a good choice for an 'everyman dwarf' who can relate a little easier to Bilbo.

But this is all about the Longbeards and there's tons of little touches to reinforce that.

They were clothed, but they didn't have their over-clothes on. Here's what I mean: link