I want it for a few reasons. I bought my first nexus device this year (N7) and am hooked on the Nexus line.
I am really excited to try out wireless charging. I'll be able to finally make my Nexus 7 have phone sex through NFC

And I can't wait for android 4.2 and what else may come in the future.
I have never bought an all new top-spec phone before so I'm very excited. With the Nexus 4 I will not only have a phone that is on par (if not better) then other phones out there now, but is cheaper than all the other phones and will help me ditch my contract and cut my phone bill more than half each month.
I like nearly everything about the phone. The only thing I don't care for is the storage but the pros (for me at least) greatly outweigh the cons.