What I have discovered is that the literature on the mint julep can be wholly characterized by this formula: "Mint juleps are vile, except ones that use [insert bourbon] over [crushed, shaved, cubed, etc. ice] with a bit of [crushed mint, bruised mint] on the [top, bottom] along with [a little/lot] of [granulated/powedered/syrup]. Any divergence from this recipe is a/an [disgrace/abomination/abortion/unholiness] that only a/an [moron/idiot/dilettante/frat boy/sorority girl/tourist/alcholic] would drink."
On the narrow issue at hand, I've never had a mint julep I liked. Or, for that matter, mojito; I think I can say that mint in drinks is a genre I Don't Get.