I adore Alton Brown. I just loved Good Eats. Now that the show is defunct and he has moved on to being a meanie, I have to settle for the cookbooks and occasional access through Netflix. Sad day. Anyway, his margarita recipe is top notch good shit. Give it a try. It might take some prep and work, but it makes the drink all that much more satisfying.
Alton Brown Margarita
2 oz. silver tequila - high quality should go without saying
1 tbsp. kosher salt - used pink Himalayan sea salt and it was fantastic
4 small limes (key) or two large limes
1/2 small orange
2 tbsp. light agave nectar
Pour a small amount of the tequila on a saucer. Put the salt on another saucer. Dip the rim of your glass into the tequila, lift it, and hold it upside down for a few seconds to allow the extra to drop off. Dip the tequila-wet rim in the salt to coat and set aside.
Halve 2 of the small limes (or 1 of the big ones). You can cut a garnish from one half if you wish. Squeeze the limes into a Boston style cocktail shaker*. Cut the remaining lime(s) and the orange into quarters and add to the shaker. Add the agave nectar and muddle until your frustrations are out. Strain into the top of the cocktail shaker and throw away the bits.
*I do not muddle in the shaker. I muddle in a bowl and then transfer it. Tastes the same.
Return the juice to the bottom of the shaker and add the tequila. Don't forget to add the rest of the tequila from the rimming saucer! Add ice and shake for 30 seconds. Strain into your rimmed glass and drink immediately. Like your life depends on it. Seriously. So good.
Brown, Alton. Good Eats 3: The Later Years. Stewart, Tabori, & Chang, 2011.