I hate that hard polystyrene stuff that crumbles into bits if you break it - and those things made of polystyrne that look like prawn crackers and fly out of the box as soon as you open it! However, apparently, they are all being discontinued - as is bubble wrap which I do like, keep and re-use.
Plastic bags don't bother me, they are useful and they can be recycled. We don't get many of them nowadays but Ocado deliver stuff in carrier bags which they will take back and give credit for (they are not expensive anyway), next time they deliver. They will also take any other carrier bags from elsewhere that you might have. The Ocado bags are quite big and fairly strong.
I can put plastic carrier bags in my recycling bin which I do if they are torn, my council recycles them - as it does plastic drinking cups which we discussed recently.
Yogurt pots aren't recyclable, they have to go in landfill sites and there must be a lot of them.