I agree that they don't have to be fancy if they raise up a nice calf that grows and they don't cost you an arm and a leg to get it there. We have some really "plain jane" and some sad looking cows that will wean a nice calf, get bred back and never give us a minutes trouble. I bought a few for nearly cull price that were supposed to be there for that year, and they stayed around for years just quietly dropping a calf and going about their business. We still have a few that are down to gums but if they hold their condition, and breed back, they stay. Some we will supplement a little grain in the winter if they are in the "grandma group" but they have earned that spot by making us money for years. We have kept heifers out of these plain old cows, and they continue the legacy.... We do use good bulls, not all registered, but have kept a few from our own cows now as it seems they are adapted to our way of doing stuff and we are getting some nice calves out of them. I do a little AI when they are at places where there are facilities but not much in the past couple of years.
We don't have any with "ear" blood in them as they will get hit really hard at the sales, but have a couple that have some longhorn and the calves do okay. Also have some with dairy and they get hurt a bit but by the third generation it mostly just shows up in increased milk and a bigger calf.
Your cows look pretty nice.