I prefer the cold. If you feel too cold, you can just put on more clothes, do a workout or eat some spicy food to warm up. If it's too hot you can only take so much, and even then it's still too hot. There were some days where i found it hard to just due to how hot it was, even though I was only wearing pants (underwear) and no duvet covering me. Here in london it's been getting too hot, though it's a lot cooler now (but still hot)