It is great that you want to move back to Pakistan because you wish to give back to the country, but there are things that you should know and understand. Things in Pakistan have been messed up for a while now and to think they would change in a year good or bad is just being naive. The environment over hear fluctuates from time to time.
You have to make adjustment and when I say adjustment its loadshedding, crime waves and other issues. Last week there were about 30 people killed in Karachi, there was a strike...next day its normal.
So, think about it...hard and twice, but do come because in the end there is no place like Pakistan. :)