I'm going to intrude and go back to subject of the opening post briefly.
I cared for people with dementia in many of it's forms, both in acute admissions, and the later stages in private care homes. This illness brings a lot of obvious negatives for any person told they have it.
In my experience, each person has an entirely unique experience and presentation. Some people are really content, others not so. Others, in fact don't seem to mind that much and pretty much ignore it, carrying on as before as much as they can, gently accepting of change.
It's not always bad, all of the time. Whilst I cried when I first heard the news about Terry's illness, his strength, research and humour has made me feel such a big girls blouse for crying in the first place. I remembered a lot of people from the past, who showed the same spirit of revolt in the face of dementia, and who made the best of bloody bad luck.