Disclaimer: My cat is a sphynx. I do not shave him, I do not cut his whiskers. Sphynxes are pretty varied and will have differing amounts of fur in different places. If they have whiskers, they usually are short, blunted, and brittle.
This is just him in all his natural weirdness, lol.
A friend of mine had a sphinx that was the most aggressively friendly cat I have ever met. His parents kept their house pretty cold, so the theory was that he would snuggle anyone who would let him to stay warm. That might have been true initially, but he really seemed to like people as he got older. He would purr and rub on complete strangers. One of the friendliest cats I have ever met.
Aggressively friendly is a good way to put it. I'm the type of person to keep the house temp at 80°F and my sphynx still wants to cuddle. He'd be out in the sun on a warm rock in 100° weather if he could, though, but I think he just enjoys the company, too.
My cat gets more cuddly in the winter, even though the temperature difference isn't actually that big in the house. She doesn't limit herself just to winter cuddles though.