I would have to say I like Discraft Z and Westside Tournament(which will of course translate into the corresponding plastics for Latitude and DD). However, my favorite is a tie between Discraft Crystal without any flakes in it and MVP Proton. Both look and feel are key criteria in that choice.
Innova plastic is a large part of why I got away from their discs. The only thing I want to carry from them is DX. I don't get the same confidence from the feel of their Champion and Star plastics like I do from similar plastics from the other companies. However, that's just my opinion, I would say everyone's preference is going to be a little different. That's part of what makes all the options in the disc market better for everyone.