This is largely how I feel. I make games because I want to make them, but I still hope other people will play and enjoy them. I just don't have much of a stomach for self-promotion. It feels tacky, presumptuous, and embarrassing. I share my work in some limited circumstances but "marketing" as such is not really something I do. Fortunately this is just a hobby for me and not my livelihood.
One thing that stops me from sharing as much on this board is that my current "flagship" title is fairly niche and requires several hours to complete. I feel that it's not really compatible with the video impressions and open feedback threads here.