Hmm... I don't know if I have a clear favorite among my homebrewed.
Those I especially like are Acorae, Lossar and Zenite.
Acorae (CG) can be seen as a goddess of magic, but is in fact the goddess of all arts and beauty. Magic is in her portfolio as it is the highest art, and the most wondrous thing, but craft and performance are also important to her eyes. Her followers tend thus to not be necessarily grumpy bookworms like those of Mystra in the Realms may be. Her domains include magic, spell, craft and renewal.
Lossar (CG) is a kind of military trickster. As the champion of the lost causes, he always side with the losers on any conflict, and his followers are required to do the same and turn the tide of the victory. He represents hope for all those who fight against overwhelming odds or tyranny. His domains includes war, protection, healing and renewal.
Zenite (LG) is a paladin deity that strongly dislike stupidity and teach that if forced to choose between good and law, a true paladin should choose good. She's often protrayed as a bronze dragon, or as a knight riding a bronze dragon. Her domains include air, storm, knowledge and war.
On the other side, I'm quite proud of my own Bane/Chardun/Hextor/etc. equivalent (Marnard, LE). Ultimate tyrant but good negotiator, sadistic and ruthless but also concerned with loyalty and duty (although he don't necessarily has the same definition of these concepts as a paladin...), frightening and majestuous, repulsive and respect-worthy. A total bastard. His domain includes Domination, Knowledge, Nobility, Oppression (Domination domain from Divine and Defeated) and Tyranny.