My father didn't notice it much either until I visited him at his work and changed the refresh rate from his monitor from 60hz to 75hz. He then remarked that it made a difference, but still - I instantly noticed when entering his room
I also had a strange issue where I had problems watching XP on my current (LCD) monitor, whereas it was fine under Vista (I guess the opposite, of you, Shendo)... it's not logical; I still don't know where that difference came from, as both reported the same refresh rate. It could have something to do with brightness, as I tend to use dark colours for my windows in Vista, whereas I usually use "silver" in XP.