"Hyper vigilance" that's what I should call it, instead of two paragraphs of explanation.
I was once in France on a train trip. The Tour Guide had noticed I could work things out. So when we were pushed for time, he asked me to set off from the Station towards the town, and he thought people would just follow me. We left the Station, and came to a roundabout. I decided to go straight on. Some one asked me how I knew which way to go. I was amazed that they had not noticed that to the left and right, was nothing in particular, but that straight on, and not too far, was a busy road. Clue: busy road taking traffic into the village.
When we reached this road, I noticed the brown and white signs with the outline of a steam engine, (which is what we were there to see). He STILL did not notice this, and refused to believe me when I said I had not been there before.
Meeting people with such low observation skills, made me think my observation skills were just normal. It is only in the last eight years or so, have I reallised that my observation skills are much higher than the average. This has in fact saved my life on at least three occasions.
I get extremely uncomfortable in unfamiliar surroundings, if there is also a lot of people. I can cope with lots of people in familiar surroundings.
This means I like to go on holiday to somewhere comparatively quiet.
Ie The Lake District in October. St Ives at Christmas. Austria is also brilliant out of season, ie early September. Italy is diificult and the Far East would be a nightmare, I think. Canada in March was also excellent.