Can you imagine the laid-back carpenter and the uptight woman. Claire snatched her dentures from her mouth and dropped them into the pocket of her exotic print dress. A guest could easily find himself leaving Claire's carrying her sofa. I think you can see Claire's idiosyncrasies. Now - lets look at dialogue.
Dialogue is used to provide mood and information.
But readers learn much more from dialogue. They can learn the character's education, occupation, age, attitudes by the way they talk. This is learned by the way the character speaks and the selection of words. In my romance suspense - the janitor Charlie has a stutter. When you use dialect or a speech problem, you don't want to over use them.