If we leave aside the obvious salt and fresh-ground black pepper, Garlic - fresh or granulated - is by far my favorite. I put it in just about everything.

Cumin is very good friends with cabbage and beans. Curry powder goes well with cauliflower. Lately I've grown ford of smoked paprika from Spain (pimenton ahumado) which is great with meat dishes.

You should have rosemary in your garden. It's only good when fresh. Same goes for parsley, cilantro and oregano.