Simple for me too. Price and specs. I don't need a micro SD card slot, 16gb and even 8gb is enough for me, don't need a removable battery and while LTE would have been nice, it's still in its infancy here in the UK. So, a top notch phone for half the price of it's rivals(off contract), how can I say no?
I've been wishing to go off contract to give me the flexibility to chop and change phones as I please and especially to buy phones close to release date to stay relevant for as long as possible. Before the Nexus 4 came out that would have meant £500+ for the phone as well as monthly line rental costs. That would be a lot more expensive than getting a phone on a 24mth contract.
The N4 kills 3 birds with 1 stone for me so buying it really is a no-brainer.
Nexus 4: Stock
HTC Desire: OxygenZM 1.2 rom; Bravo Sense hboot; 4Ext Recovery; S-OFF
Sign up for Dropbox and get 2 GB of online storage + an extra 250 MB for both of us, FREE!