Thanks for all the replies thus far.

It seems there is a common theme of leaving medications because of feeling better, not wishing to take meds in the first place... or the fact that it feels good to be on a little bit of a high.
In my case, my Lamictal is being tapered up, so the Zyprexa is simply keeping the mood stable. Yes, it serves its purpose, though the subdued feeling is what put me off. I’d stop it for a couple of days and go back on when I sense that it is on the border of trouble. That is, when I actually get it right to predict that turning point.

Despite how I feel about medications, it is for the best that I keep taking them. For now, at least.