50/50 custody is fair, and the courts want both parents to have as much custody as possible (as long as both parents are healthy). Your daughter's opinion does matter at this point, to an extent as well.

Try to stay in the same general area as your (ex) wife, to keep your daughter's changes minimal. She stays in the same school, hopefully the same house, and keeping the rest of her life pretty solid. That helps a lot!

Best wishes to you all.