2tbsp does sound like a lot for one salad. That's what, about 250 calories just for the oil? Reduces the calories that you have available to eat a wide variety of other nutritious foods.
I find that when i pour dressing on top of a salad, i seem to use a lot more than if i "toss" the salad with dressing. Try putting your salad greens in a big mixing bowl, top with dressing, and toss toss toss toss with a couple of big spoons until the leaves are evenly coated. Then tip out onto your serving plate. I bet you could reduce from 2tbsp to 1tbsp or less and not even notice a flavour difference.
As for your question about "good vs bad" fats, yes something like olive oil is a better option than a saturated or trans-fat-filled fat. It's just that it is still... calories. If you can stick to your calorie ranges, though, then really it's more a matter of personal preference. For example, "Low Carb" dieters tend to have higher fat percentages (replacing some carb calories with fat calories), and they will lose weight eating that way, so long as they pay attention to the bottom line calorie intake.
Goal 1 - break 200 (46 pounds lost)**DONE**
Goal 2 - leave obesity behind (BMI 29.9, at 185#) **DONE**
Goal 3 - BMI = Normal (154# or less)
| current weight: 176.0