Here's my ranking, (generally Batman is my favourite superhero, but in this particular show Wonder Woman is just so awesome that I like her a little more):
1. Wonder Woman 2. Batman 3. Superman 4. Martian Manhunter 5. Green Lantern 6. The Flash 7. Hawkgirl
Insanely hard list to put in order as I love most of them and at least like the others to some degree but here goes...
1. The Flash (I've just always wanted to be able to move at super speeds as well as the other myriad of abilities it gives him - like creating tornadoes from spinning his hands really fast) 2. Superman 3. Martian Manhunter 4. Batman 5. Green Lantern 6. Wonder Woman 7. Hawkgirl
And when Shazam is seen as part of the Justice League instead of Martian Manhunter, I would slot Shazam straight into spot #3.
1. Wonder Woman, she's just amazing in the show. So fierce and strong. 2. Flash, he always makes me laugh out loud. 3. Hawkgirl - I liked her strong personality, she really kicked ass and her anger issues worked so well. 4. Martian Manhunter - he was a character you felt very compassionate for. 5. Batman - well, duh! 6. Superman - I liked him but I don't think he stood out as much as the others. 7. Green Lantern