LOL!!! I know what you mean, same basic song structure and rythms... AC/DC comes to mind with that stuff... great band but the same basic setup for ALL their songs...

I think that once you get a firm grasp on a particular style and it comes to you without thinking about it is when you can start to improvise on that style and take all the monotony out of it.... I try to do the same thing but I usually wind up back at my basic blues teaching mostly because I'm comfortable with those structures...(the fact that it's easy helps a little too )