I love medium sized and up, honestly. I'm not picky with whether they hang below the flacid cock or not, and I'll tell you why:
I've a friend who has a massive sack. It's not so much the balls themselves, there's just a lot of skin to be had. One night, we urged him to show, and he lay on his back, unzipped, and pulled out just the sack. Everyone was laughing and just..in awe. He pulled the skin out flat and someone immediately said "Holy shit, man! You could use that thing as an extra cheat of paper! You could like..cheat on a test with your balls." Then some one said "If you were dropping off a building, you could just spread your skin out straight and create an air pocket large enough to carry you to safety.
We all call his balls "the bat wing" now.
When I was having sex with him doggy style, I really enjoyed how his low swingers were slapping on my clit. Just a little extra summin' summin'.