questions about my practice I have been practicing insight meditation daily now for over 6 years. I have learnt the Mahasi Sayadaw tradition. I focus on my abdomen rising and falling and notice when my attention goes to something else which seems to be mostly thoughts and then I gently bring it back. When my attention goes to a sensation I watch the sensation for a while until it is no longer holding attention then I bring it back to the breath. After 6 years of doing this I can't say that I have had profound insight into the true nature of reality etc. Most of the time I just feel really bored and doubtful that sitting all this time is actually changing anything. My concentration is only marginally better.  I understand Dukha, Anicca and Anatta but its more from reading about it than sitting.  I sit for an hour in the morning and 45 mins at night.  Im not sure whats going on but just feels something is missing.  I read about and hear people talking about the profound changes they experience and how their lives are filled with peace and joy from practicing so I wonder where Im going wrong?   As far as Metta practice goes I am told that at first it may feel contrived but if you keep going it begins to work but I have to say that after all these years not much has changed on that front either.  It seems that the effort and energy I apply massively out weighs the benefits. So I'm confused about this.
Boddhidharma sat for 9 years. 
The last time I was in Japan, I had an oppertunity to sit Zazen in a very old temple. I remember one of the monks talking me through the process of what I should do/expect, etc... Before the sitting commenced.

He gad no idea tgat I'd been sitting fir over a decade, but that's fine. I remember him attempting to discribe what it might be like if I have an "experience" (huge mistake, experience in Zazen can not be reduced to words). 

Anyway, when he was done, I just smiled, nodded my head, and told him, I'm not anticipating having any experience. I just intend to sit... Just sit. And that's what I did.

But the fact is, I have had experiance from zazen before, not every time, but it has happened. You have to engage the practice wuth absolutly zero preconceptions, empty your mind, and stay fixed in the moment. Constantly, reducing that moment more and more until it is merely this instant. 

When you are in this instant, that means that nothing else exists to you. That moment, that just passed, dies not exist. That moment, which is approaching, does not exist. Nothing exists except this instant. And then... This instant becomes eternity for you. And you are no longer locked in time. 

There are no words that can exoress that experience. It dies not resemble any other experience that you can relate to. There is no point in trying to imagine what it might be. If you search for it, you can nit find it, because you have no idea wgat you are searching for.