I know I come across as majorly cocky sometimes, I'm not that lacking in self-awareness

Friendly suggestion: after you finish a post, re-read it and find any bits where you talk about yourself and simply delete those paragraphs.

Yes, sometimes personal experience is relevant to a post. But no, your programming experience or British citizenship is not relevant to every post. You'd be better erring on the side of caution and your posts will be better if you just leave it out.