I agree with Spalding definitly a SHOW ME to be SEEN vs a READ ME Topic for sure. Then repetition, playing level, type of arranger KB used, techniques to be used on different songs vary greatly also. Another suggestion if your using a yamaha unit is to go thru each song in the MFD....listen to all the OTS sounds setup by the factory ....and study how they are used and also you have to know what EFFECTS to use with these combinations also....but still it will give you very good references as to what works together.
You can also then take these OTS sounds from these songs and make your own user styles very easily.