I get paper bags and re-use them for groceries until they wear out or get torn or soiled.
Once in a while I get plastic bags just to use for trash.
I have a green canvas bag my supermarket sold as a “green” promotion. I use it because I have to walk my groceries home, and it is stronger than paper or plastic.
I hate them, but I get plastic. I use them for kitty poop. Five litter boxes get scooped twice a day, so I use all the bags I get.
5 boxes scooped twice a day…whata good parent! 
:o oops When I don’t keep up with everyone on the boards, I get genders wrong. Obviously. 
I hate those shrinkwrapped packages. I think that they should be tamper-evident, but all packages should be easily opened by the consumer without special tools.
Typically use reusable plastic bags here, unless I forget.
You have to pay for bags here now, light plastic ones are 15cent, the heavy duty ones are around €1. Ive never seen paper bags, here unless you count wine bags!
I actually plan to get breathmints off those racks. I put them on my list and everything. I just like having breathmints around, and it’s not like they sell them anywhere else in the store.
We are charged for plastic bags at the grocery here, and paper is only usually used for bakery goods.
I use reuseable light fabric shopping bags that are also sold by the grocers. A portion of the saleprice goes to environmental concerns. They make an insulated zipped one too, that’s good for frozen stuff. Like the ones [here.](http://www.ecobags.com/Our_Products/The_GreenBag;jsessionid=ac112b2a1f43dfd244eff701441896e087cc4c5ec5cd.e3eSbNyQc3mLe34NaheQc34SaNv0?gc lid=CO_5p_uU24sCFRpIhgodbWunVQ)