It would depend on the situation. In a playfull, jokiong, 또는 teasing mood i'd prefer closed. In a serious 또는 um... 더 많이 adult mood i'de have to say closed.
Well he's hotter with 'em open specially cuz of the color an when they'er open he means business!! But i also like 'em closed, makes him seem 더 많이 mysterious an mischievous, leaves 당신 wondering what the hell he's thinking XD