posture preferences and their parallels in body, mind, spirit...

I'm also wondering how posture preferences are correlated to what you need and if there is a great amount of variance on a daily basis. For instance, I'm usually a big fan of half moon and airplane, but today, I wasn't really into them. An obvious point to make would be that feeling unbalanced emotionally manifests itself in physical imbalance as well. I'm looking for something deeper, though. I haven't really looked into this before. I know which poses I generally like and which I don't, but I know there's daily variance as well, which I don't often note.