Definitely Justin and Lucas. Loved all their scenes. I do wish Lucas will stay on much more in the future.
And I also love the friendly banter between Daniel and Nicole. So much more chemistry there than Daniel/Jennifer and Nicole/Eric in my opinion. (I would still love it down the road if these two got together, but that's another topic). And when Nicole and Dan went to get the toys, just before they left the house, Dan got Nicole in the face with a toy. I don't think it was planned but both actors laughed it off and kept going. Very funny, very natural. And lastly, on these two, I guess I should feel insulted by Dan calling Nicole "legs", but strangely, I don't, as it seems to be done precisely in good humor. So I love these two and I love the laughs between them. Add Jennifer and Eric, and Nicole and Dan are brought down, unfortunately.