Addiction

The meaning of the word addiction in the english lexicon varies according to context. A positive addiction is a beneficial habit--where the benefits outweigh the costs. A negative addiction is a detrimental habit--where the benefits are not worth the negative financial, physical and mental costs. A neutral addiction is a habit in which it is not clear if the organism (or species) benefits from the activity. There can be negative addictions, and also postive addictions but there are more negative ones.
Examples of "negative addictions" are: drug addiction (e.g. alcoholism, nicotine addiction), problem gambling, ergomania, compulsive overeating, shopping addiction, computer addiction, pornography addiction, television addiction, etc
Examples of "positive addictions" are: exercise, eating healthy and volunteering.An example of a "neutral addiction" is mowing the lawn.


http://en.wikipedia.org/wiki/Addiction