There is an interesting discussion in our new forum about whether it is right to attempt to emulate another preacher when learning how to preach. You can join the conversation and read what was written here: http://shermancox.wpengine.com/emulatepreachers.
One writer stated the following common thing:
You do the work, God will bring the inspiration it is not you who should be in the pulpit but THE PREACHER Jesus by way of the Holy Spirit, you need to get out of the way and let God have God’s way.