Hi Robo2010,

To answer your question: You bother because you enjoy creating something which is unique to your vision, using tools that are great fun and challenging to use. I also hope you continue to do so.
Your work is, IMO, really good or excellent in many instances (obviously this comment is prejudiced by my likes and dislikes about the subject matter of your renders) and technically very good in most of the renders.
You seem to be getting (I guess on average) about 6 comments and rankings and upwards of 300 views per render. Given how many posts there are per day, I would think this would be quite usual and nothing to be disheartened about.
There also seems to be a hardcore of gallery viewers who regularly comment on pictures in the first 48 hours or so and then the picture is generally lost in the archives.
I must admit that I am very bad at commenting on the work of others because I still think I am a beginner at Poser and hence somehow unworthy to comment on the work of others. Also I would say that it takes quite a while to check through all the new Gallery posts and much more time to actually comment on the better work.
I would guess that many of the really highly viewed and commented images are for some of the more established/excellent artists who other members have added to their favourite artists list.
To give you one little bit of wisdom that works for me: Judge comments made about your work based on the skill and experience of the person making the comment. Sometimes having one good comment from a great artist is just the BEST experience. Numbers are irrelevent.

Regards,
Jovial.