He drank vodka martinis

Maybe he just likes to watch and listen to the bartender shaking his martini. It's a festive sound.

Maybe he was the alcohol equivalent of an audiophile: utterly convinced his gold-plated HDMI cables made a noticeable difference.

A shaken Martini breaks down the ice and dilutes the drink, making it the perfect alcohol for MI6

I thought it was found to likely be ice crystal related.

Shaking chips tiny bits of ice off, that our tongue can detect for a while, until they melt. Stirring doesn't create these.

The same James Bond who enters a woman's shower uninvited for sexual activity immediately after she discloses that she is a victim of child sex trafficking and statutory rape. Yeah this guy definitely isn't picking up on cues or norms.

Could just be a super taster