Thanks very much for your comments.
I will certainly give it some thought and try and work out which topic heading would suit?
With regard to your comment on observation this touches on something I keep banging on in the other website I am involved with (Railwaymodellers.com - KevinP) and that is to observe what see, model what you see and not what you think you should see.
By this I mean not all grass is green, not all tree trunks are brown, not all brickwork is red etc.etc, you know the sort of thing I mean.
And the other issue is that nothing is smartly painted, clean and tidy unless of course the Queen is visiting that day!!!!
I use numerous photographs (they are so easy in this digital world we live in) as this makes the eye focus on the area in question with no peripheral vision involved so highlights mistakes, problems or errors like nothing else. I can say I have thrown away quite a few buildings that just didn't look or feel right.
Kevin