I will use sequenced songs or midi files when necessary, but like some others here I enjoy the ability and freedom of playing with the kb styles ... It provides me with the opportunity to change from latin to swing and back again, for example, in the same tune ... I know there are some boards that allow you to 'mark' the bridge or other places in the tune so that if you want to you can go back to that spot.... that's a great feature ...
I use the 'canned' stuff for tunes I might not play that well or that often, or if a certain riff or 'hook' needs to be there ...
Again, it depends on the requirements of the venue and the client, and I guess how I 'feel' at that particular moment ...
But whatever the method, providing good music to an appreciative audience is all that matters ...
t.