The links below highlight the idea that choice isn't always good. They detail studies that seem to indicate that too much choice actually decreases our happiness and suggest that buying agents (estate agents, financial advisers etc.) can make purchases more satisfying by reducing our choice. They also present evidence that given too much choice many people decide not to choose, because it's all just too complicated.
This highlights a concern with Interactive Democracy: There may be too many ideas presented, especially at the "seconding", ePetition stage, for most people to be able to choose the best.
However, it should be the role of Parliament to discuss and refine the ideas that surround each issue in order to present a limited choice to voters, by referendum.