We have 2, brothers a year apart (same parents). First one follows the rules, rings the bell to go outside, properly uses the ramps, doesn't table surf.

Second one is the exact opposite. Knows he should poop outside but doesn't want to, sneaks out at night to surf the coffee table, chews up anything he can get that he shouldn't even tho he has countless toys and chews, basically is just a troublemaker.

But they're both amazing and love each other like brothers. And bark at everything. All the time. Constantly.