I'm really enjoying Duggan's run on the Hulk and it got me thinking. "Doc Green" seems really similar to "the Professor." And that got me starting to re-read the Hulk series that came after Peter David. I'm curious if Marvel views the Hulk still as still having a limited and defined number of "personas" or if the combination of intelligence, excitability, and nastiness more or less fluid these days? (My apologies if such a question incites Hulk fanatics to start bombarding your inbox.) Cheers!