Sanyo Katana - Because I only had a voice plan then. Great flip phone and reception, just not as cool as a Razr.
BB Curve - First smartphone and fell in love with the keyboard, I finally enjoyed texting. Got it when Sprint first came out with the 1500 Everything family plan. It wasn't until my next phone that I learned how much BB's browser sucked.
HTC Hero - Sprint's first Android phone. Was ok for a while. HTC built it with off the shelf parts and a old processor, so it never was built for android, they just had to get something on the market I guess. Liked it more when I had CM7 on it.
HTC EVO - Finally my first phone made for Android. Got it, loved it, rooted it, wished I kept it.
NS4G - Thought I be cute and get this so I would get ICS before everyone else. I'm still waiting. On to rooting. Like this as much as the EVO.