Wow, I wish I could literally say something here, as it comes out like "Emmhmmm" when I try to write it out. Let's just put it this way. There's decent preaching that makes you go "Hmm, ahhh, yes, that's true, that's nice, but..." There's good preaching that leaves you spiritually full: just good, solid exegesis of the Word and convicting truth. Then there's great preaching, preaching that makes you want to praise God, reach the lost, and rejoice in the truth. You know what I'm talking about, this is God's servant and His truth ON FIRE. Preaching that is best described here, and embodied in the following video:
Preaching that just leaves you adding nothing but a hearty "AMEN."
edit: original link to the vid is here.