1. Doesn't matter, both folding and non folding would be okay.
2. doesn't really matter either, just something not too colorful. Stylish is a plus.
3. No, do not need an in-built microphone, I have a separate one.
4. I want the ear-pads to surround my ear (over-ear)
5. I dont really know. I'd say I have a pretty normal sized head. I don't usually buy hats.
6. Don't know much about sound signatures unfortunately. I'm not really an audiophile kind of guy. Just know that I want a good pair of sounding headphones.
6.5. I'll do some research on them and see!
6.6. I live in Sweden and can usually find most stuff available to buy.
Thanks for responding!