I don't mean to throw cold water on anyone but as creative as all of these homebrew encryption schemes are, and they come up every once in a while, there is very wide agreement among people who are very serious about cryptography and spend their whole life studying it, that these kinds of approaches are not the way to go.
I think the root of the problem is that you are designing encryption algorithms that would be hard for another person to sit down and figure out with a pen and paper -- but modern cryptanalysis is done using mathematical tools that look for deeper mathematical patterns.
Modern cryptography is much more focused on employing a few very well known mathematical non-invertible operations that have withstood decades of attempts to defeat. People don't use the algorithms simply because they "seem" tricky to figure out.
I strongly recommend you pick up a book on cryptography, like
Bruce Schneier's Applied Cryptography.
Again, I don't want to dampen your enthusiasm -- cryptography is wonderfully fun -- but just don't think you can make a truely secure encryption algorithm just by combining a bunch of obfuscation and random functions.
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