Something that's excessive or that goes way beyond normal limits is inordinate — like an overly obsessive love for chocolate or a fantasy football junkie who spends an inordinate amount of time checking his team.
The adjective inordinate is the exact opposite of "reasonable" and "moderate." In fact, when you call something inordinate, you're saying it's downright exorbitant and out of proportion. It's often used to describe abnormal amounts of time spent doing something — playing video games at work or canoodling with your girlfriend at school, for example. But as Oscar Wilde once said, “An inordinate passion for pleasure is the secret of remaining young.”