I'm a talker (in case you hadn't noticed) Dh isn't. There are long silences between us but they're not awkward.
If I am in a quiet mood he'll ask me what's wrong a hundred times. Then I'll say something like, "Between all the talking I do and giving you a bj every hour, my tongue needs a rest. The taste buds are falling off."
He calls me at lunch every day and sometimes there's silence, and I'll say, "What'd you call for if you don't have anything to say to me?" and he'll say, "I'm used to you doing all the talking." Then he'll sigh and ask me which one of the kids we're having for dinner. LOL
Seriously, there is an Everybody Loves Raymond episode that deals with this; it's hilarious. They go out to dinner and all they can think to talk about is the bread and butter. In the end, though, they realize it's not that they don't have anything to say, it's that they have reached a point in their relationship where they are comfortable NOT saying.
I like that.