Without debating the definition of a vehicular cyclist, do you consider yourself one generally, in the sense that you generally believe that you are safer when you act and are treated like a slow-moving vehicle, as opposed to a pedestrian on wheels?
You may or may not ride in bike lanes or gutters, depending on both circumstances, and your ideas of safety. But generally, you take the lane (or move left to avoid a RTOL) at intersections, when you are at the speed of traffic, to avoid door zones or narrow lanes and dangerous passers, when there is any other "danger" to being farther right, or when there is no reason to stay right.
Only under unusual circumstances would you even consider riding on a sidewalk
There are situations in which you may or may not ride strictly vehicularly, like on an MUP, or specific scenarios in which you feel it is not necessary for safety (like an unclipped stop at an empty 4-way stop), but in general, the majority of your riding follows the basic principles of vehicular cycling, as you understand them.