Most the preachers I know work very hard at the craft God has called them to. They labor hour after hour, week after week, in order to faithfully feed the people God has entrusted to them.
They work hard to humbly exegete each text.
They dispense an immense amount of effort into every word.
They carefully craft nearly every sentence.
They give much thought to the illustrations they use.
They want the gospel to be front and center every time they climb into the pulpit.
Despite the hard work, there is one common shortcoming I see in a lot of preaching, including my own. It's a shortcoming that I believe separates the sub-par sermons from the good ones.