I was wondering what approach people are using when it comes to multiple drawings for assemblies. Do you keep all your sheets together with sheet tabs....

...or do you start/use a new drawings for each separate sheet that is required (which has the benefit of being able to have unique file names)?

I ask because I prefer the first method but my client always wants single separate copies of each sheet in PDF & DXF format. Saving out to PDF from this approach places all sheets under the same output file. There is a DXF option to export as separate sheets, but it just numbers the output with all the same main file name. The PDF files can be separated but it is not that much fun. So for the most part I use the second method so that with every sheet that is done I just click my macro button to output each sheet with its individual name.