I know what's missing. It's called CONFLICT! The problem is I've created four very nice, well-balanced, calm characters. BORING!
Time to go back to the drawing board and give them some neurosis, internal strife, self-esteem issues, driving ambition... Then I can thwart them at every turn and make their lives a living hell before I give them their HEA.
It's hard. I'm too much of a nice gal. I hate to make them suffer, but they're really boring when they have no conflict.