Well, I'm a bit of a gadget freak so here it goes..
Aztak Pocket Pro (the 1st and still handy)
Nook Classic
Pandigital Novel (given away)
Nook Color
Acer Iconia 500 (use as a multimedia tablet now)
Sony PRS-300 - which was traded in to Sony for an upgrade to:
Sony PRS-650 - first e-ink touchscreen, still used frequently
Asus Transformer - currently used tablet
Nook Simple Touch - main go to e-ink reader
Nook HD - in heavy rotation
Nook HD+ the new toy
