Crystal
My advice would be just to make sure that when you get to the stage of looking at profiles you do not go outside of your comfort zone and you think with your HEAD as well as your heart when considering a match. Also, make sure you get all the information you can about the child, ask lots of questions and make sure it is your decision about agreeing to the match with the child and not that your SW thinks it is a good match for you. You will be the best judge of what you can and can't deal with when looking at profiles - of course your SW will advise but ultimately it will be your decision so don't be pushed into anything you are not comfortable with.
Children who have experienced abuse and neglect and been removed from a primary carer WILL be affected to a greater or less extent (depending upon the circumstances and child's personality etc). However it is not adoption that causes the problems, it is the past experiences they bring with them that can be challenging and cause daily struggles.
however, if you are true to yourself, do your research and only go for a match where you are 100% comfortable (maybe with one or two 'collywobbles' pre matching panel!) then you should have a very happy experience of being an adoptive Mummy (or just 'Mummy' really

).
Our son was a great match for us and we feel extremely lucky to have him

Personally I think it helps if they are very young when placed with adopters .... but that's another story
Good luck
DE