I think when I buy beach bags, I think about where I'm going with it. If I'm just going to be hanging out by myself, won't know anyone there and made plans at the last minute, I think I would be content with any kind of bag.
But if I'm going with friends to a nice pool or a vacation resort, then I definitely want something that looks chick but is not expensive. Straw bags are good for that because they always look fashionable. I don't like fabric beach bags because they stain easily. Straw bags won't have that problem. And if you don't feel like carrying multiple handbags to vacation, it could double up as a handbag or purse in the daytime as well.