The honest answer: sex is a weak predictor
New owners often arrive with strong folklore: males are friendlier, females are moodier, males are lap cats, females are hunters. Decades of owner experience and veterinary observation support something duller and more useful, which is that the variation within each sex dwarfs the average difference between them. Breed, early socialisation, the individual cat's own temperament, and neutering status each shape daily behaviour more than sex does. The confident, people-loving female and the aloof, solitary male both exist in large numbers, and choosing by sex alone is a reliable way to be surprised.
What actually differs before neutering
Where sex genuinely matters is in the unneutered cat. An intact male is driven to roam widely, is more likely to fight other males, and commonly sprays strong-smelling urine to mark territory indoors and out. An intact female comes into season repeatedly through the breeding months, often with loud calling, restlessness, and determined escape attempts, and unplanned litters become a real risk. These are not personality flaws; they are reproductive behaviour, and they are the strongest argument that the male-or-female question only becomes a calm one after neutering, which most owners arrange as a matter of routine with their veterinarian.
The modest tendencies that remain afterwards
Once neutered, a few soft tendencies survive. Males are on average slightly larger and heavier boned than females of the same breed, which matters for very small homes or owners wanting a smaller cat. Some owners and shelter workers report neutered males as marginally more tolerant and attention-seeking, and females as marginally more independent, but these are averages drawn over thousands of cats and say little about the kitten asleep in front of you. Health watchfulness also differs slightly by sex over a lifetime, which your veterinarian can cover at routine visits, but neither sex is the cheaper or hardier choice in any way that should drive the decision.
Choose the cat, not the category
A better selection method starts with your household rather than the cat's sex. Consider how much social intensity you want, because a demanding, follow-you-everywhere companion and a peaceful, parallel-living cat are both available in each sex. If you are adopting an adult, spend real time with the individual and ask the shelter or breeder about that cat specifically. If you are choosing a kitten, watch how the litter behaves, note which kitten seeks people out, and remember that breed character will tell you more than the sex split of the litter does. If you already have a cat, the resident cat's temperament and a slow introduction matter far more than pairing rules about sex.
Settling the question at home
In the end, most owners who chose by individual fit cannot imagine the other sex being better, because the bond forms with the cat they actually got. Pick the temperament that suits your days, neuter unless there is a considered breeding plan with veterinary guidance, and put your energy into setup and settling-in rather than the sex debate. When the chosen cat arrives, KinsLe Family Sharing helps the whole household share that cat's profile and care information, so feeding, play, and vet details stay consistent whoever is on duty.