You're welcome to submit your own things, but it has been said that if you mostly submit your own things and no one votes them up that you should try submitting something different.
Well it seems that I submit mostly the tutorials from the given site but there is know harm in spreading free knowledge plus I do submit articles from other sites once in a while to other sites. Also if I don’t submit a tutorial how would I know if it will get voted up? I really don’t trust the voting system as I know that other users will use different user names to vote up their article.
Plus letting another potential user know that there is a tutorial out there that can help them far out ways the voting system. And if others are offended of me submitting my tutorials then they should not click them as in most cases it seems that the user that hates on the tutorials submitted have a similar site or have a friend with a similar site that they support.