This fellow is a keeper even if he never catches a mouse. Every cat I have had any dealings with have wanted to scratch and bite and not interested in being petted. This big guy just walked in and made him self at home. No signs of stress. He slept on our bed last night. He kept having to get up to go pee though. Probably 4-5xs.
If he's peeing that frequently, I'd have him looked at, and switch him to a Urinary tract health food. Purina makes one. Older neutered male cats have big problems with bladder stones that at the very least, make them think they have to pee all the time, because the stones take up the volume of the bladder... but it can be very painful and seriously life threatening when they pass the stones. It's all correctable with diet, something wrong with the PH of regular processed cat chow.