Two years ago, I led a group there. My favorites were Top of the World:
Link to Top of the World Description and Kane Creek
Link to Kane Creek Description. Kane Creek is much harder in the last third of the trail, but is a beautiful all day trail. The trail coming out of the canyon is pretty technical.
Top of the world has some technical sections but mostly rocky slow driving, but the view will blow your mind.
Fins and Things is pretty fun as well, but one of our trucks broke an axle there trying too hard to climb a rock face.
Lots to do and lots of good trail books on Moab....