Sense of humour

[Melilot Brandybuck]

It always strikes me, when I re-read LOTR, that hobbits and orcs are the only beings in ME who have a sense of humour. I can easily imagine a group of rowdy hobbits, crowded around a table in a local inn, singing drinking songs and telling ridiculous jokes.

Pippin leaning over a table in the Green Dragon, "An orc, a troll and a wolf walk into a bar...."

Or, Shagrat, leaning up against a damp wall in Cirith Ungol, sniggering to Gorbag, "Yo momma's so ugly, she's gonna put Shelob out of business...
BWAHAHAHAHAHA... "

I can't see this with Elves. Nor men, especially men from Gondor. Do you think Tolkien did this on purpose, mixing the "higher" races - those with noble lineage and history of great deeds (elves and men), with those of lesser stature? Or in the case of orcs, just down right evil? It seems to me, if the books were all about elves and men, they would be full of "thee" and "thou" and not nearly as interesting without the hobbits from a place with "the uncouth name of Shire."