This place needs a sketchbook forum
4yr
theunraveler
Maybe there already is one but I am not acquainted with but I dont think it would be a bad idea for this place to have a sketch book forum so individuals can post and it be like a sketch dump for all to view and get inspiration
I think I see what you want.
A simplier version could be to add the possibility to follow someone gallery (opposed to current "all posts" from the person). That would also help search by category.
We can create group inside our own images gallery, it would be a nice addition to be able to subscribe to some of it.