Mania (Anointing) is a treasure from God

What went on before that you took meds for?

My hypomania was pretty destructive, actually. But I do remember the allure of the facsimile of passion. Once I had my meds right, I found I could still be passionate about things.

You can take medicine to help with bipolar disorder that doesn't squelch your creativity or make you feel like a different person. If you are struggling with losing your ambition and drive, you need to talk to your doctor and let him/her know that. There are Christian psychiatrists, too, and that would probably be helpful if your current doctor is not a Christian.
Hypomania/mania can be a gift from God because you can use the associated drive and impulses to do positive things.
At the same time, bipolar disorder that is not managed can develop into a more serious form of the disease, including psychosis or sometimes schizophrenia.
If your medicine is changing you in ways you don't like, please try to find a better medicine for you before you just try to quit cold turkey or give up on managing bipolar disorder. I'm not a doctor and wouldn't dare make medicine recommendations, but I do have bipolar disorder, and I understand what you're feeling.
Sometimes it's a gift, but other times it's our "thorn in our flesh," but even when it's hard, our disease can bring us closer to God if we take advantage of our need for total dependence on Him and the drive and ambition He gives us.

I wish I could know what I know now, but before I had my first manic episode. I was calm, I liked myself, didn't struggle with humility, could enjoy myself, and felt in control. Once I had my first manic episode, I dealt with anxiety, apathy, hated myself, struggled with pride, never enjoyed myself thoroughly, and felt out of control, with spending, sex, religious obsessions, etc..