Why would God find that more pleasing? Shouldn't God simply revel in good actions, if indeed, he is the embodiment of righteousness?
Of course God wants good actions, but He also desires a relationship with us. If you look at all the instances of the people labeled as "righteous" in the Bible, it wasn't merely their good deeds that made them so, but their relationship with God.
Straightness? Are you claiming that God is a line?
Yes, God is a line.
I was merely relating one of the meanings of the original Hebrew word for righteousness. And one of them is indeed "straight." That's the unfortunate thing about languages: sometimes so much gets lost in translation, especially over time. When we think of righteousness, we merely think of the word "goodness," but in the original Hebrew it meant so much more than that. Straight implies no irregularities, deformities or crookedness, and doesn't necessarily refer to a line, as I'm sure you're well aware.
I also think the term "true" righteousness is misleading, if you are defining it simply as "always doing the right thing". It would be more accurate to label it as "perfect righteousness". As mentioned before, telling the truth is telling the truth. You can't do it any better than God in any single instance. There is no difference between God telling the truth and humans telling the truth. They are both the exact same example of righteousness. One cannot be "more true" than the other.
Hmm, I see where you're coming from, but I would disagree because there are also motives to be considered. One can tell the truth with wrong motives, and in that case, the "rightness" or "righteousness" of the truth-telling is cancelled out by the wrong motives. God, on the other hand, always tells the truth with correct motives. Even the devil (if you believe in him) will tell the truth if it suits his dark motives, and I would not be so kind as to call him righteous for doing so.