I’m new on this of online business thing, and English is not my native language. In spite of that, I have written my first pages and posts by myself. I totally agree with what you say here. There is nothing more satisfactory than to produce your own content, even if it is not perfect or excellent in the beginning, but with time and practice, it will surely improve.
I've ranked websites in the past with spun content, and now they are still on #1 position of google. First year (2014) google found me because my spun was really bad, many paragraphs were just copied and my position drop from #2 to around #20 after a panda update. Later I cleaned all my text with better spun (I didn't buy any article!), my ranking went up again, and with more backlinks I reached #1 and it is still there