I try and read most threads all the way through IF I am completely interested. If I notice that I am skimming more then reading then I stop. I a lot of the longer threads everyone does end up saying the same thing.
On a thread like this where you are asking and open question and wanting an opinion from everyone I would probably respond up to (maybe a few after) the 10th page.
On pictures threads I try and find people whos pictures do not have a lot of comments or are on the 1st page of comments and leave something. I know how great I feel when someone looks at my quilts and says something nice
I LOVE it!!!!!!
As an author of a thread I love it when my threads go above 10 pages. I have a couple and I have read every single post on those threads! It does make me feel good because it means I asked or said something of value and interest