Out of the top of my head:
- PDF editor (no, okular does not edit PDFs, it just pretends to do that). I used this PDF X-Change (proprietary) under Wine, but it crashes somewhat often.
- (Own a fancy video camera) a decent video editor (yes, there are video editors for Linux... no, I am not happy with them).
- (Own a fancy photo camera) a good RAW editor (yes, I know dcraw and the others, IMHO they are not as good as Lightroom or the RAW editor that came with my camera which I failed to run using Wine)
- a photo manager that allows me to easily create a high quality album for printing.
On a practical note, my wife uses OSX. Using the same OS would simplify some of my `family sys-admin duties`.