Assigning employees to tasks regardless of interest level tends to result in team members who are disinterested or not putting in a lot of effort; the remedy is to allow employees to choose what projects they work on. This does have potential downsides depending on your company and may not fit every situation; however, the game developer Valve has exploited this idea very successfully. "Each person decides individually what he or she wants to work on. This freedom doesn’t just apply to choosing day to day tasks, but even in selecting and forming teams and projects. The desks at Valve are all on wheels, enabling workers to move to new projects as they see fit." says Jeff Wofford of jeffwofford.com. Valve has become famous for it's high quality products, and an open and collaborative environment are a big part of the reason why.
References:
Hanford, D. J. (2012, August). Collaborative
Workspaces Encourage Communication, Idea Sharing, Flexibility. Retrieved
March 6, 2013, from Facilitiesnet:
http://www.facilitiesnet.com/designconstruction/article/Collaborative-Workspaces-Encourage-Communication-Idea-Sharing-Flexibility--13385#
Wofford, J. (2012, May 2). Is Valve Too Good to be
True? Retrieved March 6, 2013, from Holy Ghost Stories:
http://www.jeffwofford.com/?p=943