Being that I am someone who doesn't do well in heat at all and have a history of seizures and health issues from the heat, I would have to take living where it's always winter over always summer. At least when it's winter you are able to find ways to warm up and keep yourself warm. With summer and getting hot, it's much more difficult to be able to cool down that it is to warm up and I sure know that from the heatwaves we had this past summer 2022 in the UK.
Winter in Texas is fine by me because we don't really get nasty weather and it generally doesn't get super cold during the daytime. Summer in Texas, on the other hand, is a scorcher.