I prefer a margarita, on the rocks, that I can just taste the tequila without it being too strong. If I wanted lemonade, I would just drink lemonade :) Figuring out just the right proportions of your ingredients will let you fine tune your recipe to match your taste preferences.
Margaritas are simple to make, but I rarely get one that I enjoy at a restaurant or bar. Here's my latest recipe that gives me a perfect margarita every time.
2 oz. (Quality) Tequila
2 oz. (Freshly Squeezed) Lime Juice
1 oz. Simple Syrup
Here's another that I have tried and liked for a while:
2 oz. Tequila
1.75 oz. Cointreau or Patron Citronge
1.75 oz. Lime Juice
1.5 oz. Simple Syrup
Step 1: Make your own lime juice
TIP: Freeze your leftover lime juice.
Step 2: Mix your ingredients
I also always use a cocktail mixer with ice.
Give it a good shake.