This is a fantastic article, Netopalis - thanks for writing and posting it! I'm in the process of rebuilding one of my PFS characters and have been stuck for a while, so this gives me some new ideas and inspiration to work with.
On point #5, my paladin has Profession: Baker as a skill, which he uses for his day job checks. This doesn't usually enter actual game play, but once in a while I find myself with an opportunity to make jokes about it. My favorite line is something about my character trying to influence someone or show gratitude by presenting them with a plate of paladin cookies. It's good for table-wide laugh, so it's worth the skill points I've dedicated to it.
On point #2, I have my paladin write his own Pathfinder Chronicles, which begin with his backstory. That is, I myself actually keep a running document in which I write like he would write, covering the details of each scenario he completes. Like his baking, this doesn't usually come up in actual game play, but it gives me a better feel for who he is and what he values. Plus, it provides a good record of material that I can use to make references from (which I guess also relates to #3).
Once again, thanks for a great article!