Left, so you can see into it more easily when you open the door.
We're probably going for a full-height door but I'm arguing for a shelf/shelves that aren't the full depth of the cupboard so you can still access stuff that's at the back on the bottom shelf.
cool. no idea why i typed L-shaped shelves because I meant straight. with the door, just be mindful of it fouling on that skirting and the potential difficulty of getting wine in and out. you might want to have the rack on the right.
now we're getting somewhere. L-shaped shelves. what side will the door hinge on?