I've also had a fairly dramatic loss of appetite with Abilify. It was mostly in the beginning and lessened with time. It will probably resolve itself given a period of adjustment.
I wasn't bothered by it. I was carrying a little extra weight at the time and it got rid of it so I considered it a bonus.
I've been on Abilify for months now and it's been a godsend for me. After spending 10 months in bed, nearly incapacitated, only getting up to rant and rage and not responding to Wellbutrin alone, the Abilify finally kicked in and helped to stabilize a mixed episode that very nearly landed me in the hospital. I hope you have good results with the med as well.
Bipolar IIIt is a melancholy of mine own, compounded of many simples, extracted from many objects, and indeed the sundry contemplation of my travels, in which my often rumination wraps me in a most humorous sadness. -- William Shakespeare