Yeah, I perhaps should have made it clear that occupying a full lane is something I do probably <2% of the time. Not very often, and for similar reasons to the rest of the comment: I don't really want to have to deal with cars, and if I can stay right and let them by, I will.
I'm in America, so it depends on the road; where we have unprotected bike lanes, then I'm in that & there's passing room, but too often there are "sharrows" where there really isn't a good deal of room for passing. Then it's very situational. (Usually the car taking up part of an oncoming lane as they pass.)
https://www.britishcycling.org.uk/cycletraining/article/ct20...
He eventually did a half lane change, buzzing me as he went by, then got stuck at the next red light while I caught up. Ridiculous.
¹IANAL; in the jurisdiction I'm in, but my understanding is that this is common