The Best of Second Life Awards (BOSL) nominations have just been anounced, and these are in the "Best Overall Sim" category:
[pteron], Cap Estel, Garden of Dreams, Insilico, Majesterium, Seawolf Monsters and Stepford
I haven't seen some of these but they are on my list now :-)
For the rest of the nominations in the other categories see here: http://thebosl.com/bosl_blog/2011/03/bosl-awards-2011-official-nominations/