Since I ride AND walk, I like having a nice "Staff" bag, like my T itleist S44 cart bag in the picture. But - I also have an inexpensive carry bag for walking, a Cleveland "QuikLite" bag I got on closeout for only $50.
My criteria is lots of pockets, and I like having an independent putterwell. The more spaces/segments at the top - the better, to keep clubs from getting tangled, and more pockets are great.