Personally, I prefer when people add my writings to their favourites. I have usually spend more time on writing, than I have on my photos and often are my writings much more personal and have received much more though from my behalf. It also take more dedication from the viewer to read and, especially, understand a poem or short story, than to simply give a quick glance at a photo.
Usually I also have a better feeling about my writings. A sense of completion and achievement.