Addictions Without Twelve Step Programs

So I'm having one of those nights where I feel I really need to find some new music for my life (also known as the night of payday). And being I'm a modern gentlemen (meaning I like to be able to shop while wearing my pajamas), I try use iTunes to purchase my music whenever possible these days. Usually on these nights, I lookup bands I've heard of from friends, but have yet to actually hear their music. But tonight I couldn't recall hearing of any new bands lately that I hadn't already heard. So I decided to input in the little search box the names and bands I already know I like and the albums of theirs I like the most and then from there, I would try and find new music by listening to the music that iTunes said "Listeners also bought..." (meaning people who bought the album I looked up also bought music from these other artists and albums). The problem I've been running into tonight is that 90% of those artists and albums listed in that section I ALREADY OWN. And so far, I've already heard the 10% I don't own and they just happen to be bands I don't like.
At what point is someone's constant need to find new music considered an addiction? Because I'm beginning to think I'm there (which I can't say I mind).