Colour chart - artistic or anal retentiveness?

I know I can be quite anal in my behaviour at times - I have always liked making lists, keeping notebooks for various things etc. Some people would find it odd, I just think it's perfectly normal to make and keep lists of things. For instance, I have a comprehensive list of every birthday and Christmas present that anyone has ever bought me since I was about 16. So, if you ever wondered what it was - I'm sure I could dig it out for you! This seems to help my memory - I can, for example, remember that a friend (who was my boyfriend at the time) bought me a red covered A4 sketchbook for my 19th birthday. I can even remember some of the sketches I first did in there - of him (Paul Leonard, in case you're wondering), my brother Daniel, and one of Sherry, our German Shepherd dog at that time.

I therefore wonder if this colour chart I've made (along with others that I have but don't happen to have photographed for fear of over stretching your patience every so slightly) is a sign of my well-organised artistic mind or just another symptom of my anal retentiveness. I don't really care either way - just thought I'd share it in case anyone else can relate to it!

I've utilised a cut-off from a piece of mountboard to paint a sample of every brand and type of yellow and green paint that I have in my possession. The only trouble now, is that I need to update this list, as I've since bought more for my different craft works!  I think I shall probably need a larger piece of mount card. I've temporarily misplaced the blue swatch card that I created, but if I find it you may yet see it on here!

Handy reference card, without a doubt. Absolutely necessary for my work? Not really.