I feed in their enclosure. It's just more simple for me and less stressful for the snakes. Not to mention most of mine probably wouldn't eat in a separate area anyway. The more picky ones wouldn't be comfortable enough or were too distracted in trying to explore than eat. I'm just speaking for my personal animals, not in general. It just seems so unnecessary to move them.
I don't really handle my snakes regularly other than for cleaning. I'm not much for recreational handling either. I only open the enclosures to feed or check up on them and never have any of my ball pythons displayed some sort of aggression. I have one big female that will come right to the front when I open her enclosure sometimes. She'll be totally in your face expecting food, but she doesn't strike or attack. She's just hungry. When she's not hungry, she doesn't usually do anything but sit on her hot spot.