I have 2 EReaders, a Sony and a Kindle. I originally wanted a Kindle, but when we found out I was having the double day spinal surgery, my husband surprised me with a Sony Ereader (he is a fan of Sony products). Approximately a year later I purchased a Kindle too due to some of the features that the Sony didn't have but the Kindle did. As far as the IPad, I think that will be my next big purchase, but because of the price, it will be a while before that happens.
When it comes to buying habits involving EBooks and Print, since I receive most of books for free because of requested reviews, I will answer this question as if I didn't. Again due to the price of books, I would buy mainly in EBook editions as I find them much less expensive then print and I like the feature of having them in hand within seconds and without even having to leave the house.
What about you? What gadgets doe you own? Are you planning to ask Santa for one?