Well I for one put all my sample editor projects in one master folder and workspace, then create sub folders to contain each project and source tree. So every time I want to check a new version (Rob likes renaming everything apparently) everything breaks.
It's really more than just an semantic annoyance or personal preference--ost12666 stated it 100% correctly. Standard includes should be <filename> and project includes should be "filename". And the only time it is appropriate to prepend a relative path to filename is when the file location is known to be fixed relative to the project root, otherwise all paths should be defined in the tool settings or makefile.