He also wrote the recap episode of Champloo, and the final four episodes (the lead writer Ohara co-wrote 24-25 though). I think that Watanabe obviously enjoys writing whimsical stuff the best, and stuff which shows his sillier side. It could be good for something in between a series, but yeah, I don't think it was a good idea for him to lead off on the series. The baseball episode in Champloo is still the best thing he has written so far, especially compared to the conclusion of the series. Lol.
Wait, he wrote Evanescent Encounter? Hype + 1000, I loved those episodes.
(Baseball episode was awesome too, but I was already expecting that kind of stuff from Dandy)