Lewis really is the best character

He's not the best character, but he was brilliantly acted. Mike started as the best character, but they weren't able to sustain him as more than the one-trick pony. IMO, Donna took over and was consistently best for the run of the series.

I think if these were real life people, then Lewis would be by far the most likable. He shows vulnerability, cares about people, and has interests. Some may call his interests odd, but he actually has a life.