Oh man, kicking the addiction is tough.
I made the decision some years back not to buy any more knives for myself, and I've stuck to it. I just don't have any practical need for them (or the ones I already have), and I no longer have any "disposable income", so I can't justify the cost in my head. I don't need more knives sitting around doing nothing.
"Just because I like it" used to be a good enough reason to buy a new knife, but then it got to the point that I'd buy a new knife, enjoy the initial high of the acquisition, and then the practical part of my brain would say "Now what are you going to do with it?", and the knife would inevitably end up in storage with me saying "Why did I buy that?".
But I still get the urge.
I was browsing the internet researching knives recently and I came across two that really tested my resolve, the Giant Mouse GMF4, and the Begg Knives Filoso. I really like both of them, and it was tough to resist the little voice inside my head that says "C'mon, you know you want it. It's not really expensive. You deserve it. Think about how much you'll enjoy owning it". But I'm holding tough.
The Filoso is a dagger, and I REALLY have no use for it. The GMF4 on the other hand is a very practical, all-purpose fixed-blade, and if I carried a fixed-blade, or simply needed one, I would buy one. But I don't, so I won't.
Still holding strong. Taking it one day at a time. But it ain't easy .