lol...Deepsquat I notice you giving everyone advice on this post like its gospel. We have plenty of know it alls on this board and we don't need another one. If you prefer to do six sets for legs than good for you bro.
I personally change it up every few weeks. Sometimes I'll train with more intensity and do less sets, but I am currently focusing on volume. I have found volume to work better for me. And I do get bigger and stronger every month....thats the whole point.
If someone wants to post some pics I'll be more than happy.
Oh yeah, In my opinion you are seriously neglecting your hamstrings. You have a pic of those you want to show off?
peace