Before you can start creating something, you need to have some knowledge and building blocks to work with. The thread starter knows two fills and doesn't know how to create new ones, so the most logical step is to learn some vocabulary from real and tangible sources -- stuff that you can use and stuff that has been used successfully. I'm not against devising your own vocabulary, since that's what makes us all unique, but there's no point in trying to re-invent the wheel when people have been driving cars for a couple of hundred years...
I share Joe P's notion of listening, copying and generalising. Learn a few dozen fills, and figure out how they work, and you'll soon realise how they relate to one another. Drumming isn't about combining rudiments -- it's about making music.
Well, different strokes for different folks I suppose.
Rudiments are the foundation of drumming. Of course drumming is about making music not just focusing on rudiments, but everything you play on the drums is a rudiment of some sort. This is like saying "Playing guitar isn't about playing chords, it's about playing music." While that's true, you have to understand how chords work together and how to apply them to create that music in the first place.
I have pages and pages of notation for different drum fills that I've created using my approach. I use rudiments as my basis for creating these fills, but once applied on the kit they don't sound like an exercise in rudiment practice - I try to apply creativity, know when to rest, know when to roll.
I think the artist analogy is pretty sound. You can learn how the Mona Lisa was constructed by looking at all the different primitve shapes in the painting, looking at shading, colors...etc. You can learn a lot from this, but to simply paint another Mona Lisa is boring and expresses nothing about yourself. Take what you've learned and create a brand new work of art that expresses you.
I think listening to other drum fills is a good source for inspiration and learning. Deconstructing is beneficial, what I'm arguing about is the idea one poster said when he said "do not create your own fills, imitate everyone else". I suppose I would rather spend my time expressing myself then disecting and copying someone elses expression.
I don't understand your "don't reinvent the wheel" comment. Creating your own fills and music in general has no boundries, all it takes is creativity. If anything, copying someone elses work is reinventing the wheel.