Personally, the thrill of a new device just doesn't have the same excitement as purchases from years ago. I still have fond memories of my first really powerful graphics card, the Radeon HD 3870.
I think there's also a large dose of "decision fatigue" in our lives, where we have so many valid options at our disposal that our brains can't handle it. Whatever we just decided to buy, we almost certainly have regrets because we question if what we just got was "the right choice." Best I can say is, carefully plan your purchase (try to have guidelines for when to purchase), and then try not to look back!