I see the dwarves a bit more like Bob does...
I mean, the Hylar are all good and decent, but I don't really see dwarves as extremely friendly or accepting...they do get a Cha penalty, after all, and have a reputation to be insular and secretive. Dwarves don't make lasting friends with people too unlike themselves. Grudging respect, even comroderie, maybe, but probably never a true friendship (the Gimli/Legolas thing was undoubtedly an exception to the rule.

)
IMC, I take them even farther down the road...
I've said elsewhere, IMC, my elves are limp-wristed faerie boys of questionable sexuality to whom beauty, aestetic wonder, and prettiness are more important than most things. Not that they ignore the structure, just that they're always suckers for things that make strangers' eyes wide, even if they don't serve a purpose. Elves = Estrogen.
Meanwhile, Dwarves = Testosterone. They're good with tools, they work with their hands, their tough and the like to bust each other. They like competition, but only within the bounds of reasonability...they're not destructive or anger-filled, but they are fans of proving their toughness. They command respect...they're probably nearly as guilty as the elves are of cockiness, but they're confident about actual functionality. An ugly coal burning engine, for instance...works pefectly for the dwarves. Put a rock in one end, get movin' gears on the other.
It's the fact that the elves (especially the mountain-dwelling grey elves) are so dismissive of this...they hate the thing. This beautiful masterwork of craftsmanship and labor...they throw it back in the faces of the dwarves, disregarding any love or effort put into it. The elves don't care how many hours of minig or how much it had to be beaten or what kind of rocks make the black smoke. As far as they're concerned it's dirty and hot and *very* not-pretty.
On the same level, the elves are irked at the dwarves...that beautiful stone sculpture, fashioned of the finest black rock to represent the heart of the Drow...just....tossed into the oven! That brilliant painting? They call it driftwood and colored water! Have they no sense of art? Have they no love of design?
The truth is, IMC, elves and dwarves are two sides of the same coin. And, as usual, they have come to hate each other.
Dwarves ain't pretty. They've got no use for long blonde hair and languages with more "L"'s than are healthy. They are utilitarian. The elves are more aesthetic.
It just so happens that elves and dwarves IMC have just recently ended a long, drawn-out war that only ended with the institution of a puppet human king. The orcs have always been barbaric tribes on the outskirts, the halflings have always been the gypsy migrant workers, and the gnomes have always been the seaside designers of gizmos and gadgets. The elves and the dwarves have always been at each other's throats. The humans?
Well, we're not really sure where the humans fit in right now...