My pantry is ever changing - I don't like to keep a large pantry because I'm always afraid I won't be able to use food before it expires. Many items in the pantry are either something left over from a previous meal (jars of rice), ingredients from a meal I didn't get to (jar of pine nuts) or something I got for a REALLY good price (coconut water). I do have basic pantry items that are on hand at all times:
Canned tomatoes (crushed, petite diced, whole)
Salsa
Magi (chicken flavored)
Beans
Pasta
Wine
Potatoes
Garlic
Yogurt
Frozen fruit
English muffins
Peanut butter (natural)
Olive oil
Oatmeal
Butter
Tortillas
Lemon juice
Something pickled (usually olives)
Frozen veggies
Chicken breasts
Honey
Flour
Yeast
Parmesan Cheese
Fresh ginger
Kosher salt
Anchovies
Vinegars (balsamic, red wine, cider)
Cheese
Fruit spreads
Barley
Canned clams
Chocolate