I read a lot of them also and don't post after seeing many many pages of posts...however when the topic strikes my fancy I will read each and every post and then make a comment so I can check on further remarks or developments within the topic.
I know when I post a topic it makes me feel good to even see pages of "good" "great" or "I like its" ... a few words never hurt regardless how many times they are said.
Guess I contradict what I do with what I like but mmmmm I'll have to think about it more.