When I am happy, I never actually realise this. When I am having a good time, when I am with friends, when I do anything I like I just find that it is just 'ok' or 'alright'.
Then when I go through bad patches like I have been going through for the past month, I realise just how lucky I was and that I kind of must have taken the good times for granted. I wish I could go back to my old ways, but then if I have my old way of life when I am happy I don't actually realise this. I feel content and satisfied but never think of it as anything more than that (i never feel really joyful etc), and it is only when my life turns that I realised how lucky I was and how grateful I should have been. I think the saying is:
"You never know what you have until it's gone"
Even though I am aware of this concept, I have gone through good and bad patches a lot in my life and I never seem to learn from my mistakes. It is sort of something I know and am are of but I can't change myself to realise how happy I am. It is just the way I am.
I can provide examples of situations if you would like me to.