to be honnest, pretty much all DJs that have been on the circit long enuf would have had to 'cross over' from one style to another at some point in their time.
after all, thats the only way how dance music has servived - by reinvention
carl cox used to play regga (if the artical i read about him is true), half the older trance dj's used to play hardcore. why limit yourself to one style per life time?