She's overall insanely ambitious, and if I remember her story from Silmarillion correctly, she was the only one female present among the Elvish princes when they were discussing their war preparations against Morgoth after the Silmarils were stolen. She's a woman constantly interfering into the business of men with an ambition to project power and rule like a man.
But she also suffers from the typical female vanity. She wishes more than just to be obeyed and/or feared. All shall love me and despair! is a prudish way to say I wish all men desire me! In that aspect she's little different from a teenage girl posting bikini pictures on Facebook. Both are attention
I guess what makes Galadriel a positive character is the fact that in the end she wins over her (double) temptation. She accepts her fate as a woman (though an Elf with magical powers). She will diminish and go into exile, she says but her present life in Lorien is also not one of great heroic deeds. She already has one of the rings of power in her possession and she uses it to keep the weather mild and provide peaceful environment for her people. And she spends her days weaving clothes for the men.
Now I won't declare that I can fully guess Tolkien's intentions (though he was probably no friend to feminism which was already quite prominent in his time). I don't know whom Galadriel was based upon. May be, it was a great lady of his acquaintance. Yet, she appears to me to point to the typical modern woman with her double temptation: the wish to live and project power in a male way (through her career, paycheck, social position) while also having additional (sexual) power over men.
Her weapons were her crystal eyes
Making every man mad
Black as the dark night she was
Got what noone else had
Somehow it doesn't make modern women happier than their unenlightened mothers and grannies used to be. May be, it's time to diminish and return to the traditional female occupation to provide peaceful environment for her menfolk and family in general?