Five episodes in, I am starting to not like Toby. He was funny at first, as the fat guy with a sense of humor about it, but he was a total knob in the episode about the Steelers. Going out of his way to get Kate to watch football with him, after she made it clear that it was her thing to do alone, and then invites a buddy over, too? What a dope.
As for the others, it's very easy to like Randall, Jack and Rebecca.
Kevin is still just kind of there.
The Pool episode was most excellent.