I always use my fob... it's in my pocket, and I don't even bother taking it out
I like closing the door, walking away, and clicking the "lock" button twice without even looking back.
The nice beeping sound makes it seem like my car has just magically decided to lock down on it's own to unobservant bystanders!
I thought I'd get tired of that... but it's been a couple months now - still fun!