When I was a kid, the rule at any intersection with a stop sign or a light was to cross like a pedestrian, regardless of my vehicle.

Of course, I was a kid so I frequently ignored that rule... but even now there's a good chance I'd take crosswalks on my bike. Turning left with traffic just seems way too sketchy.

I should mention that I mostly skateboard, so biking in traffic is really uncomfortable for me... but that's probably an indictment of our infrastructure as much as my ability.