。
I have a sweet tooth.
Literal
I [topic-は] sweet-party.
甘党 (あまとう, 'person who likes sweets') — literally 'sweet faction/party.' The counterpart is 辛党 (からとう, 'person who prefers savory/spicy food or alcohol'). A single-word predicate that captures a personality trait concisely. No verb needed — the copula is implied.