My 19 year old cat is, most decidedly, unreasonable, if only for two reasons.
(1) He seems to think that I can survive him falling asleep, in the middle of the night, draped across my face. The amount of times I've been woken spluttering for oxygen and had to move a deeply asleep (and snoring!) cat from my nose and mouth in the last 19 years or so... well, let's put it this way, the GP tries to offer me sleeping pills and looks vaguely anxious when I decline them saying "I'd never wake up again... trust me on this one!!!". But ever since the first night we had him, the only place he can apparently fall asleep when it's dark, is curled up next to my head...
(2) Every morning, at 0615, after he has demanded that the household awake (who needs an alarm clock when you have a cat with a working digestive system?!), and we're all downstairs blearily starting our days, he thunders back upstairs and has the feline equivalent of a toddler tantrum/meltdown, because there's no warm bodies in any of the beds for him to take the morning chill off his tootsies upon. Our neighbours have asked if everything's once or twice (thin wall), because of the pitiful yodelling that goes on (he sits and mournfully cries to the point that it sounds like a small child saying "hello?!" over, and over, and over again... and no matter how many times I stand at the foot of the stairs - a whole 12 steps below him - and tell him that we're all downstairs/trying to eat breakfast/for God sake, cat, get a grip!?!?!, he never listens...) and look slightly askance when I have to point out that I no longer have a toddler whom they think I'm abusing, but it's a bloody cat... well, I've lost count.
But you know something, I'm going to be heartbroken when he eventually dies. Some of his quirks are because of feline dementia (which he was diagnosed with 12 years or so ago... the vet is astounded by the fact he's still going - but then; he is very spoiled!), but most of them he's had since he was 3 weeks old and I rescued him from being drowned by his mother's "owner"'s son).