Matzah is termed "the bread on which many things are answered": Pesachim 115b
Matzah as the "bread of poverty" because it is prepared by two people, one baking and one heating the oven (to prevent it from becoming leaven), in the fashion of paupers: Pesachim 115b-116a
The Blessing of "Al Achilat Matzah" is recited on the broken (middle) Matzah: Pesachim 115b-116a
Methods of Consumption
If one swallowed Matzah without chewing: Pesachim 115b
Liquefied Matzah, swallowed without Chewing: Pesachim 35a
If one was fed Matzah while out of his right mind: Rosh HaShanah 28a
If one was force-fed Matzah: Rosh HaShanah 28a
If one swallowed Matzah and Bitter Herbs together: Pesachim 115b
Matzah swallowed inside a piece of bark: Pesachim 115b
Over-Eating in consuming Matzah: Pesachim 107b, 108a, 120a