I've stopped...because suddenly (OMG!) my collection seems...good enough...for me? I know, there are still abunch of deck i'd LOVE to own, like the Vanessa or the Victorian Romantic but...one day i had to look in the mirror and tell myself: you DO NOT have money. You are a STUDENT. You live with your MOTHER, you don't pay the BILLS. So stop buying decks, assume, you are poor. And you don't have room left!
So i had to assume i don't have money to spend with decks. Now i feel ashamed when i buy a deck i know i won't use...because i'm using a money that isn't really mine. (it's mine, but i feel like i'm using it in a selfish way). Maybe when i'm completely independant, then i'll buy anything i want and that's my business only. But for now...well...only if it's a deck i really wish, an opportunity i can't miss etc.
AND trading and exchanges have really made everything better. I'm able to pass along decks that i don't use to people who might enjoy them, and i have been getting decks that i never knew that existed but i end up falling in love with (like The Wisdom Well).
Trade trains are also great - get a new deck, but your collection doesn't gain weight - a win-win situation!
I think this kind of control is really something rational. You decide, you suffer because there's thi deck and that deck and they all seem so nice, but after a while, you'll feel better than if you had indulged yourself. Been there
~Marina