Too much traffic almost all the time when I commute so yes, I generally obey all the traffic laws I can. One light does not change for cyclists at all (even though there's a marked spot in the bike lane for cyclists), and yes, it's been reported, so I do run that if there's no other vehicles around, making sure to stop first and make a show that I'm not doing it recklessly (yes, I've seen cyclists stopped here for blowing this light).

There is a newly desiged "one way" street near my house that totally made the bike routing more dangerous. Instead of being able to ride up the wide one way street and get a great view of an uncontrolled intersection, cyclists must now either cross a very busy street to access a different busier route or use the sidewalk, both resulting in a poorer view of the uncontrolled intersection. Since it's not a busy one way, I often enter it the wrong way so I can see cars jamming on the busier route and watch out for them.

Other than that, I can't think of anything except breaking the 30 mph speed limit on a downhill section of my route.