I must choose... but choose wisely.
Not necessarily in order of preference...
1 - Klingon (Atrocities)
2 - Romulan (Atrocities)
3 - Swarm (Hugh Manatee)
4 - Narn (Rambie)
5 - Pandoran (Atrocities)
6 - Orion (AJC)
7 - Tholian (Oleg)
8 - Cuckleheed (don't know who did it, but it's a real "sleeper" hit)
9 - Dragons (Andres)
10 - EDF (Atrocities)