There's lots of things pastors end up doing that weren't/aren't in the job description, things the pastoral search team or hiring committee did not tell them about, but not all of those are things a pastor ought to be doing. However, there are also some things a pastor must do that a church typically won't ask him to do (and sometimes won't appreciate when he does).
To lead a healthy community in Christ, a pastor must:
1. Work hard to keep a congregation from becoming co-dependent.
How this plays out is a strategic withholding of oneself. Not a distancing, not a neglect of real duty and care. The pastor's call is to feed the sheep. But it is also to equip the saints for ministry, and this can't happen if he does all the ministry himself. It is good to regularly hold back enough that if you were to get hit by a bus today -- or worse, have an affair with your secretary -- your church can live (and grow!) without you. Very few churches advertise for a pastor who will lead a church in such a way that they don't need him very much.
2. Spend a lot of time with his family.
Good churches appreciate this and allow space for it. Certainly there are pastors who sacrifice ministry on the altar of family, just as there are pastors who do the opposite, but setting idolatry either way aside, a good pastor will realize his first calling is to his family and will carve out lots of time for them. Many churches will say "Please put your family first" to a pastor, but when it gets right down to it, many struggle with confusion when a pastor gets down to refusing to meet on his day off or compromise commitments made to his family for requests from the people who pay his bills. Certainly a pastor should not ignore a real crisis, but requests are more frequent than crises.
I'm a firm believer with Bonhoeffer's dictum that a pastor does not exist to be his congregation's accuser before God and man. Nevertheless, a pastoral "must" people rarely talk about is the appropriate biblical rebuke. Pastors often rebuke other people outside the church from the pulpit; very few are confident enough in the gospel to rebuke their own people (when it is warranted). Certainly some idiot souls make their living beating their people up from the pulpit and in the counseling room, but abuse is not what rebuke is. I've never seen a pastoral job description that said "Tell us when we're disobedient, lazy, or stubborn." With real love comes real correction; as the Lord disciplines those he loves -- not as punishment, not as wrath, but as corrective training -- a pastor who loves his people will rebuke them when necessary. (And they him. :-)