If you write, draw, paint or take pictures you'd be odd if you didn't ask yourself- is my stuff any good or not? Quiet apart from stylistic and compositional or formal qualities I think it is a good idea to ask yourself- 'is my work interesting?' and 'is my work emotionally affecting?' It has to be one or the other. Interest is to be found in new information, new sights, new ways of looking at something. Emotion is to be found in melodrama, domination and submission, tugging at heart strings, nostalgia, suspense, in your faceness, violence and sex. If your work is neither interesting or emotionally affecting it probably is 'thin' and needs a rethink, reboot or moving on to something stronger. Get used to asking yourself- 'how interesting is my work?' 'How emotionally affecting is it?' This is more useful than asking 'is it any good?' You can increase emotion in something that is lacking interest by increasing contrast- literally in a photograph or picture, and through cutting away the nuances in writing, the shades of grey.