I'm originally from the east coast, so I don't have to tell most of you that Chicago pizza just doesn't work for me. Consequently, I only voluntarily eat pizza in Chicago about once a year. That said, I'll also put in a vote for Piece...it's my restaurant of choice when it comes to pizza. Though I'll agree, some nights it's only good, but it still comes a lot closer to what I know as pizza than anything I find at a lot of other Chicago area pizza places.
For other NY/CT pizza fans, I have heard a lot of good things about Pizza DOC, but haven't tried it yet. Any thoughts?