My mother has vascular dementia. I was concerned about her quality of life at the rest home she is in, but am relieved that with the dementia her wants and needs are also greatly shrunk, along with her memory, so she is actually what I would call content. She agrees! Nothing will ever make bingo interesting for her (I agree on that one!), but she is perfectly happy reading the same page over and over in a beloved book, and watching the news, re-reading her favourite magazine - simple things. (The re-reading is of course because one relies on memory to know if one has read the page/book/magazine previously! Something that didn't occur to me until observing these things in my mother.)
Movie-watching, a previous love, has greatly lessened in enjoyment for her, alas, due to the short-term memory loss, but again, she is largely happy being with loved ones (my brother and myself, and our families) just looking at the big colourful images and interpersonal dynamics in the movie, and does not seem to really feel the loss of being able to follow a story in this way.
Because of watching her in her contentment I am not so afraid of vascular dementia. Alzheimers, on the other hand - for me that is another thing.