Thanissaro has several talks on this issue. This is just one of them:
Pushing the Limits
Desire & Imagination in the Buddhist Path
All phenomena is rooted on desire. The only thing not rooted in desire is nibbana. But as Thanissaro says in another talk (i've heard it from a mp3), nibbana cannot be cloned. You cannot emulate it by adopting its characteristics. Therefore, you have to gradually follow a path that will lead you there; a path rooted on skillful desires. Even some "healthy" aversions are necessary to a certain degree in some stages the path, like the aversion to unskilful actions, unskillful states of mind, bad companions, etc.