My first ereader was a Palm PDA. I read a couple of books on it and thought I was all technologically advanced,lol.
Then I bought a Sony- a 500 I think. The first generation Kindle followed that one. I then bought every single version of Kindle up to and including the PW, except for the DX.
My Nooks were impulse buys as were the Kobos- I have a gadget addiction.
I also have an ipad 4 and an ipad mini. I read on those sometimes, but the majority of my reading happens on my Kindle and Nook HD.