We have been home with our daughter from Ukraine for one month now. We have two biological children ages 8 and 5, and our daughter is 3. There is an adjustment period, getting used to each other. But that happens if you have a newborn baby too, everyone has to get used to the new routine, the new life. For her its been a big adjustment, going from an orphanage to a family at age 3. She's doing wonderfully. For our boys its going from only boys to having another girl besides mom in the house. For me its getting three kids ready for mornings we have to take kids to school. :) After a month i can say its going really well. Everyone is adjusting and her rules are the same as the boys', and she gets disciplined just like the boys. There is no different treatment for her because she is adopted. She is our child, she is part of our family. :)
We adopted our daughter from Ukraine, she was a waiting child because she has mild CP. www.reecesrainbow.org and look at the waiting children from other countries. These kids languish in orphanages and then get sent to mental institutions when they reach age 4. :( Its horrifying, but they can be adopted before they ever set foot into an institution! reeces Rainbow is a downs syndrome orphan ministry, but you can click 'other angels' for other diagnosis, some as minor as missing fingers and major as severe CP and spina bifida.
Good luck in your journey! We found our daughter in April 2010, committed to her in May and had our paperwork in her country by June, traveled the entire month of October and have been home for a month! :) Its a beautiful, stressful, awesome journey and its worth every paper signed, every minute traveled, and every penny spent!
Oh, and don't hope to choose on disposition.... lol We have two boys that are polar opposites, and our daughter was described as 'easy going, pleasant' and she is a spitfire! She has her mind set and she is determined no matter what! Its good though, she needs that attitude to get where she wants to go! :)