I view images and make comments ( when I can ) but have to admit if I see a minor of glaring mistake I will just not comment...yeah soft I know.
I also see  the WOW etc comments on images and think to myself they are rather mundane...but I dont say so....yeah soft again.
On the other side of the coin if some one points out an error on one of my images and it is justified then I appreciate it  and make sure I dont do it again...as well as tell myself off for not having noticed it in the first place.
I used to put up glamour stuff under a different name and one guy in particular was always pretty critical although I thought his comments were stupid.So one day I looked at his gallery..it was pretty much crap.
But I do value peoples comments on my landscapes..makes me go out and do even more.