grammar - What does it mean when この is in front of a personal pronoun?

As in このオレさま and この僕も. I know the literal translation, but I never understood what the intent of it is.

Answer

I think この usually implies some quality of “me”. You can translate it as “someone like me”. You can insert some adjectives between この and .

Usually it sounds proud or arrogant, especially in このオレさま.

フン、この(偉大なる)ヤング様に勝負を挑むなど、百年早いわ！

天才美少女であるこのアタシが教えてあげるんだから、ありがたく思いなさい！

But as Hyperworm pointed out, it can be used in exactly the opposite sense. e.g.

この(拙い)私でいいの？
この平凡なあたしにも王子様が現れないかな。

I think この私 tends to refer to some positive quality, and こんな私 some negative quality. But I'm not sure.

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「よく聞け！私はお前達とは違うのじゃ！だからして…この私に気安く話しかけるでないぞ！分かったか？一般人ども！」　ｂｙ　久地院美華

I think this is a pose of この私. (Does anyone know the name of this pose?)