Counting Calories Only

Calories are king for weight loss. You may find that certain macros (carbs, fat, protein) are more filling. As mentioned protein can help protect your existing muscle. You may also find that you are frequently under in certain nutrients (don't look at the potassium numbers though, they aren't required on labels, so the database is way off on that). If you really don't want to watch the other numbers, just watch the calories. At some point, you may want to evaluate the other numbers though.

Yes.

Calories are the only important thing for weight loss. As you get further into the weight loss process, you probably start taking other factors into consideration, like satiety (feeling full) and fueling workouts properly, etc.

I look at calories for weight loss but do try to hit my protein goal as that helps me feel more full. IME if I am hitting my calorie goal and protein goal the rest takes care of itself.
You don't have to look at anything but calories for weight loss.

I look at protein as well. I want to lose as much fat and as little muscle as I can so I make sure to hit 100g of protein. Biggest issue for me is that there seems to be a wide variety on what is the proper protein amount, so 100g is based on it being a nice round number, and not much more than that. I try to hit it with food but if I'm under then I will have a protein shake. The one I found is 35g and 150 cals so just 10 cals not from protein. And it is cheap at Costco. Took a bit to get used to the stevia taste, but now I like it. Kaizen Chocolate something.

I pay a bit of attention to sodium, more to see how it impacts my weight from water retention. But that's it.

I lost 45 pounds this year only counting calories. I am a vegetarian and I've kind of settled into low fat/high carb because it works for me (with the carbs coming mostly from whole grains, beans, and starchy vegetables). I am just not all that interested in consuming a lot of protein (usually it makes me feel sluggish and doesn't actually keep me full).

We cook most meals from scratch, never the exact same thing twice (even if the recipe is the same, it is too tedious for me to reformulate it with a 300 gram sweet potato instead of a 350 gram sweet potato, or the brown rice pasta instead of the whole wheat pasta, etc., and I'm not chopping off 50 grams of sweet potato just so I can use the previously-entered recipe), so building recipes with macros isn't going to work for me. I could do it, but if I am not going to have the same thing again, there isn't much of a point in investing all that time.

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