There's a lot of variations on the gypsy out there. This isn't the 1930's vodka gypsy recipe that you've probably had. This variation also differs slightly from the canonical versions you might have seen out there. Many recipes for the Gypsy call for Green Chartreuse. I think Yellow is a bit more milder, allowing the other components of this drink to really shine. Even though Chartreuse can be a bit of an "acquired taste" for a cocktail consisting nearly 2/3 in volume of Gin and Chartreuse, it doesn't taste as intense as you might expect. In fact, I think it's nicely balanced with equal parts citrus, herb and sweetness.
If you're looking to really hit this drink out of the park, look for a spice or citrus forward contemporary styled gin.