Every single time I go grocery shopping I ask the bagger to use as few bags as possible. Or I ask them to fill the bags all the way. Sometimes I tell them both.
Every single time they try to give me half-full bags. Sometimes they even put so little in each bag that they use up all my re-usable bags (and I have a fair number of them), and then start using plastic.
Seriously, why is this so hard for them to understand and/or get right?
Edited to Add:
Several people have asked why I don't just bag stuff myself. Without thinking to add it directly here, I answered that below.