Carpeted. My preference is definitely solidified for the area I live in. I ripped out the carpet in my office and bedroom a few months ago, and I replaced my office's but not my bedroom's yet, and I am just waiting for my tax refund to replace my bedroom's. It's noticeably colder in my bedroom without my carpet. When my dog gets zoomies, the entire bed slides across the floor. My hardwoods are so scratched now. My dog is also less comfortable jumping up and down without the carpet to cushion her.
Also, hardwoods are noticeably more gross. I swept just yesterday, and I can see the dust already. I miss the illusion of my floors staying clean-ish until it's time to vacuum them again.