On Launch: Priority should always be given to the File a User requested to open
I consider this behavior to be an egregious bug. Almost an assault on your users.
Bad Scenario 1: Double click a file with an associated extension. Action opens Word, Word opens requested file then opens most n number of most recent unclosed documents.
Bad Result 1: User is left looking at a document from a prior session that may have absolutely no current pertinence. File requested by the user is 4 windows below and has to be tracked down.
Bad Scenario 2: Double click a file with an associated extension. Action opens Word, A change to Word or exciting news is present that Word wants to notify the user about and decides to display a prompt on startup. Prompt is displayed, User dismisses notice.
Bad Result 2: After dismissing the exciting notification user is left staring at the start page with options to create a new file or open one asking themselves "Where is the file I double clicked to launch Word in the first place?"
This is SSOOOOooo bad. Please Word Team read this, don't EVER EVER lose track or de-prioritize the file that a user launched your program to view/edit in the first place. It makes Word feel like malware.