I prefer the exit row, especially on long flights. I like the legroom, for sure, but I really like not feeling claustrophobic because there's either no row in front or the row in front doesn't recline. I like (again, particularly on long flights) the easy access to the lavs.

Don't like the smell of the lavs sometimes, but it's funny, the smell is that overpowering burst of disinfectant that they use. I've taken to carrying a handkerchief in a baggie that I've put scent on (essential oil - mint,eucalyptus, whatever) to deal with the stink. There must be a better disninfectant out there!

I rarely find people congregating in big numbers, except post-breakfast/pre-landing on a longhaul international flight. Then I just stretch my legs out on my bag, keep the IFE screen up if there is one, and maintain my own space.

The cold? I'm usually prepared, but I have found that if there's an extra blanket around, it will do a quite good job at blocking the draft around the door.

And taking the tray table in and out of the armrest can actually be a nice 'polite' way to re-establish my space if someone starts encroaching....