DH started the Nook craze in our house. I was originally interested in a Kindle until his dad bought him a Nook Color (he wanted an Android tablet and the Nook Color is Android based). Once he got his, I decided to go with a Nook for several reasons:
1. I don't need the extras that he has. I just want to read. The e-ink is perfect and the Nook is nice and small.
2. LEND ME! Being a family of readers, the ability to loan certain BN books to each other is a definite win. Enough so that my daughter (16) used her Christmas money to buy herself a Nook. Now, when one of us finishes a book that's Lend Me compatible, we loan it to the other person. There are also websites dedicated to lending your books.
3. More formats available. I like the option of getting ebooks from the library or other readers.
I get questioned about my Nook everywhere I go. My first response to people when asked how I like it is, "I never really missed it before I bought it, but now I can't live without it". I take it everywhere, tucked into my purse. If I have to wait a few minutes anywhere, I open it up and start reading. I've read more since Christmas than I have in probably the last 6 months.