I have two cats, both pedigree, nearly three years old, after a lifetime of feral/rescue cats, none of which were in the least bit affectionate, or would come anywhere near our laps.
DH and I found a breeder for my preferred breed and went to look at the litter. We had originally wanted a boy, specific colouring - came away having reserved two girls, different markings!
The ones I have are bred for their affectionate nature and they certainly live up to it. They like to be in the same room all the time, will follow me to the shower or the loo, and are forever round my ankles. And are lovely lap-warmers!
One blessing is that they don't bother me at night, but if I'm not stirring by about 7am, will come and leap on my chest and try to rub my nose!
They have their routine at bedtime as well; will come and sit by my feet about 10.30pm and wait to be groomed, as they know they get a nice treat afterwards!