This post from Jeffrey Palermo has managed to distilled the reasons for a lot of things that I consider important.
From persistence ignorance to dependency injection.
To be rather more exact, Jeffrey has managed to put it in words in a way that I don't think that I would have ever could.
Go and read it.
The concepts will probably not be earth shattering, but the ability to communicate clearly about this is very important.
Good link. Jeffrey almost has a "staccato" style to his delivery. It makes for very clear reading.
Are you saying Palermo looks like Shrek! I think you may have something here...