Jason Isaacs, Lucius Malfoy, was interviewed by CNN and he discussed the Harry Potter series.  Thanks to SS we have a small summary of what was said, and you can watch the interview below:

Jason admitted that he tried out for the Gilderoy Lockhart role in Chamber of Secrets, as well as Lucius (though is more grateful for getting the latter role). He said the best bits are off-camera, working with great actors like Michael Gambon, Maggie Smith, Richard Harris, Gary Oldman, and Bill Nighy, to name a few.
He said that work on the Harry Potter films is relatively easy for him, and that the biggest challenge is in keeping the wig up and act.
Jason joked that he was bitter and jealous that he never got a scene in Half-Blood Prince, but overall voiced his overall joy at being a part of the series.
If Jason were Lucius Malfoy for a day, he said he’d go around killing Muggles. If Jason were to meet Lucius, he might just shave off the long blond locks.