I've been using dpn's, and last night finished a bag I was doing on circ's. I have to say that I was longing for some DPN's. They don't feel clumsy at all to me, and I also like to have the stopping points at the end of each needle as opposed to crap slipping off the circ everytime I stop. (I have to stop alot to take care of the wee'uns.)
I'm seriously rethinking my plans to buy an interchangable circ set. (I still may just to use for flat pieces...but there is a certain charm to a big old bamboo needle.