Nice drink.. Tequila and Coffee is a match made in heaven!

I agree with the preference for blanco in this (yet to try with that). The reposado gets lost/buried... Dry, roasty, perhaps begging for a tiny touch of sweetness to contrast the lovely saline aftertaste... Maybe the dry, salty character is its charm and purpose. But, regardless, the reposado is stifled.

Really lovely variant on an espresso martini but I do think using tequila blanco is preferable to reposado for a more distinctive taste.