Quentin Tarantino wanted James Woods to play a role in the film, and made him five different cash offers. Woods' agent refused the offers without ever mentioning it to Woods as the sums offered were well below what Woods would usually receive. When Tarantino and Woods later met for the first time, Woods learned of the offer and was annoyed enough to get a new agent. Tarantino avoided telling Woods which role he was offered "because the actor who played the role was magnificent anyway". It is widely accepted that the role that Tarantino was referring to was Mr. Orange.
No offence to Tim Roth but this is sad to hear, JW would have made a perfect Mr Orange. Despite acting well, Tim's US accent is unconvincing and uncomfortable to listen to, for me (Scampy) anyway.