While the character seemed interesting in the past, after the Titans Tomorrow storyline, she's allegedly being semi-mind controlled by her evil future self and has been less than memorable in just about everything she was in (she was briefly in that series with drugged super-teens fighting in the arena, right?).
I liked her as the reformed white martian, and basically the J'onn Junior - she was similar to him enough and yet different to be a Bruce/Dick kind of combo.