I only just noticed this thread, and Pete sounds like a fine cat.
His behaviour all sounds fairly typical. Male cats tend to fight more, and wander more, than female cats, basically in the search for, and competition for, getting their paw over. Since he was neutered relatively young, Pete probably won't be as bad, but that can apparently make them a bit more prone to being overweight.
Kai was only neutered when I got him, probably four or five years old, and he's always tended to wander off, now barely spending any time even near the house.
Talisker was neutered at an age similar to Pete, and still tended to fight, so did have cuts and nicks in his ears. Towards humans he was the most mild mannered and pleasant cat I've ever known, but that obviously didn't extend to his feline colleagues.
They do get up to a lot of things that we don't know about. On the face of it, Zev is a typical lazy cat, and sleeps as many hours as she can, but whilst she may be on the bottom of my bed when I go to sleep, and is there in the morning, she clearly disappears off in the middle of the night. sometimes for hours.
If you really want to know what he gets up to, you'll need to put cameras on the cat flap, his (current) favourite sleeping location, food bowls, and litter tray!
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