I think it's down to the E of GFE, Experience. As you said it's not just down to the hole. But the whole thing. I would assume that if it's just the hole, MP might be the logical choice.So far it seems like kissing is the most important for a lot of people. I'm not entirely surprised tbh but it's nice to read this thread and see that many people share that preference!!
It's a good reminder that intimacy is so much more than just penetration and that actually, most clients are looking for more than just a warm holePardon the vulgarity haha.