I still have all my windows overlapping, and I suspect it's because my formative years were spent in RISC OS. Also I still find "File Open" dialogs weird - ever

I still have all my windows overlapping, and I suspect it's because my formative years were spent in RISC OS. Also I still find "File Open" dialogs weird - every app having a miniature and less-functional tiny 'Filer' built in...