to my eyes, you have about three or four really cool projects you draw from and five or six boring/flat ones. lose the flat ones, keep the strong ones and draw more from them if possible. if not, just cut it down. like in any other aspect of filmmaking, losing the bad parts makes the good stronger, even if it means shorter.
not that the "bad" parts are bad, just not what i'd be looking for in a DP reel-- flat, boring, simple. They may service the story completely, but they don't service your reel.
the cool parts are really cool though, good job.