I don’t really consider them boycotts because they are indefinite and I don’t have any demands or don’t see how they could change that would make me receptive to them.
Cars. I’ll personally ride along or carpool with someone but I don’t want to add another car to the world and to the road. Even if we switched over to all electric cars, they still require lots of resources to build and maintain and put a lot of demand on infrastructure and urban design.
Animal products. I am against all animal products and treating animal as commodity. We’ve enslaved animals all the way down to the biological level, it’s unethical.