I'm pretty Sicilian if I've been crossed. I don't seek revenge, but I never forget. And I make it hard to repair, which is not a great quality because if people held me to that standard, no one would be around me - ever.
I don't write down my experiences, but I have a very decent memory. I have tons of books in which I write down phrases as they occur to me. That's how I write songs. I'll need a line and I'll go through the books and find it, the right rhyme and everything.
To give real service you must add something which cannot be bought or measured with money, and that is sincerity and integrity.