"Aside from the objectively obvious difference between residing in a vacuum and within the protective shell of a planetary atmosphere..."

(Always so literal, Aya.)

"...I have always found that travel amongst the starts offers a sense of...freedom."

Freedom to do what she wanted, even within the boundaries of her higher commanding officer. A rank that Hal Jordan held over her because she chose to recognize it. Just as she chose to be a Green Lantern. Space had always been about choice for her, and it was in Space that she had been given the opportunity to grow and learn.