My reading habits have definitely changed. I read
tonnes as a child, but after high school my love of reading really dwindled, and I went from reading about twenty books a year to reading about two books a year. (That's what you get for being forced to read five terrible books a year and write essay after essay on them, I guess...). Even so, though, I was still collecting an obscene number of books - so I would end up with huge stacks of paper books that I wanted to "eventually" read.
Since getting my Kindle, I'm reading so much more. I really think that I'm going back to my childhood reading habits of about 20 books a year (I know that isn't much, but I'm dyslexic, so it takes me a little while to read a page

). Well, not yet - but once I've gotten back into the swing of reading all the time, I'll get there!
I'm also spending lots less money on ebooks. I'm banned from my city's library (my library card was stolen and they wouldn't believe me when I said I'd never even heard of the books that they were asking me return... Seriously, who steals books from a library?), but I download a ridiculous amount of public domain books, and buying direct from the author or publisher is so much cheaper than buying through a retailer.
I have a much bigger to-read list since buying my ereader, because everything is so much more readily available. Seriously, how will I ever get through ~300 books?!