Always with the handbrake, its a habit that I find more comfortable, don't get the slight 'freewheeling' as you move from the brake to accelerator for more control and a faster/easier getaway.

But also when I was first in a queue at a junction in my Skoda and hit from behind by a dozy idiot on the phone in his BMW, I wasn't punted into the traffic.

Its actually a requirement here on learning and is marked on at the driving test. Every American I've driven around thinks its crazy though.