New to this "addiction" but I expect it will really grow as we now are members of DVC and look to make a lot more trips to Disney.
My DS-18, DS-15 and DS-11 all got a taste of it this past year when we went, with the DS-11 getting an earlier start and doing very well with his trading while we were there. The older two got a later start (after some jealousy set in for the younger one's good finds) but caught on fast.
My DW and I got a couple of commemorative pins, but not much on the trip. I have made a few purchases on Ebay since. I expect to make some bulk purchases before we go again so we all have some pins to trade on the upcoming trips. Since I am a collector at heart, I expect this will become another satisfying outlet (if not for my DW, at least for me....lol).