I don't lock my bike, it's more about being forgetful than purposely not locking. I work at a suburbon office bldg - not much crime around, so I never really worried about it in the first place.

I use to lock it up, then one day I realized I forgot the key, so I couldn't lock it, and it took about 2 weeks to find the key, and in that time, I wasn't carrying the lock because - well I couldn't use it . so when I did find the key I then was forgetting to bring the lock. so Now it's been like 6 weeks with no locking.