I voted for the balance as well. I like reading whaffy stories with smoochies, but then again, I also like the whams and angst, ocassionaly. So if it's all put into one story, I'm one happy girl.
And basically, the way I see it, the B-plot happens around the A-plot (for longer stories). Shorties should be B-plot only. And for the longer ones, first some good angst before going to the waffy parts.
Saskia (still too sleepy for this to sound logical)