We may drive ourselves because of personal love for the Lord, a desire to see people won to Christ and built up in the faith, and because we wish to see the work of God prosper. There is also the sense of personal accomplishment in a job well done. But sometimes expectations from within may not be as wholesome as they should be. We may expect ourselves to perform faultlessly without realizing that such a motivation in and of itself could stem from a sense of insecurity, pride, fear of failure, or jealousy. It might be a worthwhile exercise to take time to write down all of one's personal expectations and then beside each one to list the motivation which supports it.
Many expectations come from without.
We may look at external circumstances, both favorable and unfavorable, and they may shape our expectations. We may observe the ministry which others have and decide we must achieve what they are achieving. It's also possible to become controlled by what other people, whether friends or enemies, think and expect of us. We need to understand that there are people who can do some things better than we can. I don't believe that I have ever met a Christian who possesses all of the gifts described in the Bible.