There's been plenty of talk about burritos on Bostonist and in other local news media. And sure, this Bostonist enjoys a burrito now and again, but sometimes you want something that's not so heavy or rice-filled. The quesadillas at Anna's Taqueria are formidable competitors if you broaden the search for good Mexican in Boston. The tortilla is oiled and grilled to crispy perfection, while the cheese inside is creamy. The best choice for a......