My two reasons for viewing less:

-- too much repetition (people that post 8 images a day usually the cause, and yes, including rendered images). I've blocked those artists so I can see more of other stuff.

-- too much "soft porn" ..women actually wear skirts that cover their butt cheeks, sit with their legs closed, and wear shirts that don't show cleavage or nipples. Well unless you're married to Kanye West. LOL

And some pointers:

-- If using 3D characters, remember.  Faces and eyes are posable. Staring blankly into space really takes away from an image. 

-- If a person is barefoot or wearing flats, pick something other than a high heel pose.

-- Don't use too many or too few lights, and make sure you're using the right kind of lighting for the renderer you are using (IBL and SuperFly do not mix).