Has anybody taken haldol (haloperidol) for a long time and then quit it? Were they normal after that?

Yes and Yes. There is nothing addictive about Haldol (haloperidol) that would cause problems with stopping it. Haldol (haloperidol) has some long term risks that can be an issue even if the medicine is stopped, but sopping the medicine does not increase these risks; in fact, the risks are lessened by stopping the medicine.
Haldol (haloperidol) Taking Haldol (haloperidol) for several years then stopping can lead to involuntary movements called withdrawal dyskinesias. Consult your doctor first.