You should never feel as "good" as you did when you were manic again. The problem we have is that nothing feels as good as hypomnaia and if there was a way to stay in that state we would however it typically goes to far and the next thing we know we are doing stupid things. That being said you should have a normal range of emotions on medicine. You shouldn't feel like a robot. I'd talk to your Dr. to see if your dose is too high. Stay away from weed it interferes with your medicine and its only going to make things worse and whatever you do don't stop taking medicine cold turkey. The stuff builds up in your brain over time stopping it cold turkey will only mess with your mind.