I have the privilege to share my life with two Norwegian Forest cats. Both are now 1 year old males who are unrelated but love each other like brothers. They play together all day jointly investigating everything that takes their fancy.
Then after helping out with the evening chores they settle down to watch a little TV before bed.
I have kept cats all of my life. Lots of strays, barn cats, and different types of pedigree's and I have never come across a breed that was universally intelligent and nice to human companions until I met Norwegian Forest cats.
I have lived with 4 now and all have been very intelligent and friendly. The only flaw is a tendency to make toileting mistakes during the first 6 months - absolutely no mistakes ever after that age.
Anyway the mistakes are stopped if you ensure food is placed in all likely spots.
When you look at them they respond to your mood - always - they seem to know if you need a hug or want to play. I am their pet not the other way around. I have the privilege to have been chosen.