I feel that Lilo deserves a lot more than what she got in her supposed future in the stupid anime.
I mean c'mon, Lilo would have become someone important, and super cool!
I can image her working as a Galactic cop fighting off bad guys with Stitch as her close companion. At the same time she is studying, to become a captain someday. She might have her problems with others since she's human, but always tries her best to show them that she can be just as good as everyone else.
But even though she has her fun in space, she also has her adventures at home. As a career, she is a photographer for magazines, still taking pictures of overweight people, and trying her best to show her view of beauty that society doesn't seem to accept. She also enjoys most of her time going to the beach, which to her is a great way to release stress. She still is checking on all of Stitch's cousins, making sure they are well cared for and happy in their homes.