Jim Henson once said something to the effect that if you study (too much) the work of others, you will inevitably (unintentionally) duplicate what they are doing. It's true.
All of the puppets I have built (with the exception of my glorified sock puppet), have been original patterns, although I have collected patterns to see what others are doing. I started with the Foam Book and went from there.
Without being overly blunt and by no means this isn't said with malice, you'll be better off figuring it out yourself. Sure, glean some ideas from patterns, these forums and the information that is available, but do your own thing. I don't think anyone here will disagree with that philosophy.
Some don't see originality in my designs and in some ways they may be correct. And admittedly I use a Pannabecker style mouthplate on some of my puppets and my own design on others. Head shapes are often a mystery to new builders but there are ways to come up with original patterns. I like taking a shape made of clay, covering it with masking tape and cutting it off in such a way that it lays mostly flat. I tweak it from there. Or take everyday objects and figure out how to use them in a puppet.
I think creativity is a habit and the more you exercise your mind toward creativity, the more natural it becomes. It's evident in the creations from some of the more experience builders on this forum.