Castiel is my favoirte angel actually however I guess the next favorite angel would be Gabriel. I enjoy his sense of humor and love almost all the episodes that featured him either as himself or Loki. Most of the other angels I just didn't care for and if there is another I can't think of him/her at this moment. ;P
FYI, I don't plan on leaving Livejournal but did back up my journal to dreamwidth. I'm kuwlshadow there too!