Although I'll certainly defer to the preferences of my gentleman partner on this matter, personally, I love to be watched or to feel as though it's possible to be watched.  And I love fresh air and natural lighting!

Curtains drawn... of course, if the gentleman is comfortable.  We can fuck and enjoy the view at the same time!

Windows open... absolutely, as long as I'm not right next to a noisy highway.  Hearing all the birds and the sounds of the world around us is nothing but a turn-on for me, and breathing fresh air inspires me.

Balcony?  Doors open of course... So we can practically feel like we are outside.

Or if I'm lucky enough that the gentleman is an exhibitionist, I love to play on the balcony too.  If I can tell he's getting off on it and isn't concerned about (or is even turned on by) others watching, playing in the outdoors is so delightful.  Whether someone actually does watch or not, the thrill is unmatched!  I usually end up in very high floors in my hotels, so typically there is no audience in actuality, but I've gotten lucky with rooftop construction crews and bored office workers on a few occasions.  I've also managed to be totally discreet when outdoor play was desired but "getting seen" was not.

To be honest though, fuck hotel rooms!  I typically use them, but I'm a nature girl.  I love doing it outside in the grass or amongst the trees if a gentleman is game and we can find a good spot.  Private enough not to get in trouble, public enough for the thrill.  Talk about natural lighting...