嗜好 often implies a strong, sometimes excessive preference — closer to 'addiction' or 'vice' than a casual hobby. For neutral hobbies, 爱好 (àihào) is more common. 嗜好 can also be neutral, but watch for context.
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嗜 has the mouth radical (口) — think of it as cravings of the mouth, hinting at addictive pleasures like drinking or eating. Compare with 爱好 (positive hobby) vs 嗜好 (stronger, potentially unhealthy habit).
