Smartphones
2008 Apple iPhone 3G
2009 Apple iPhone 3GS
2009 Google Nexus One, manufactured by HTC
2011 Samsung Galaxy S2
2011 iPhone 4S
2012 Samsung Galaxy S3
2013 HTC One (M7)
2013 Samsung Galaxy Note 3
2013 iPhone 5S
2014 LG G3
2014 Xiaomi Redmi Note LTE
2015 LG G4 (2 units, since the first one died to the bootloop issue)
2015 ASUS Zenfone 2 ZE551ML
2016 Samsung Galaxy A5 2016 (EU import, doesn't work with many US LTE bands)
Tablets
2010 Apple iPad
2011 Apple iPad 2
2012 Apple iPad 3
2014 Apple iPad Mini 3
2015 Apple iPad Pro
(Yes, I'm quite the Apple fanatic when it comes to tablets)
*UPCOMING* (Possibly)
2016 Samsung Galaxy S7 Edge/Samsung Galaxy Note 6 (if my G4 dies)
2015 Apple iPhone 6S
My first smartphone was the LG Phoenix P505. I didn't have it set up on any plan yet, but it did make me think twice about my thoughts on iOS, since I was able to do things on that phone that I couldn't do with my iPod Touch 4th gen.