I like a mix of styles. Sometimes it doesn't work I agree, but it can do so well.
I guess it's a case of the promoters and the djs communicating so that the people running the club can organise a good running order and the Djs can think about the progression of the night when planning their sets.
I love to hear a night that progresses throughout the whole night with on dj sort of building up to wards where the next one starts - and if their individual sets have plenty of variety to keep me on my toes even better...
...being able to mix loads of styles into one coherent set always gets my admiration!