I've got way too many to pick just one! The boulevardier, the Negroni (I'm one of those odd souls who prefers the former), and the daiquiri are all up there. I also make a Pegu Club that will have you down on your knees, weeping over all the mediocre ones you've had when you could have been drinking one of mine. The most recent one I found was a pisco caipirinha (piscaipirinha? caipirisco?). I've never heard of anyone else making one before and I think I actually liked it more than the original (but I'm in love with pisco at the moment, so don't trust my opinion here). The problem is, I can't remember exactly what I did. I know it was based off the Difford's Guide Caipirinha recipe. I know I used one Persian Lime, instead of 3/4 of a standard lime. I know I used 1:1 simple instead of 2:1. I'm pretty sure that, instead of doubling the amount of simple, I kept it at 1/2oz and added a tbsp of sugar, but I can't remember what kind (granulated, powdered, or brown, and what kind of brown). I might have also included a barspoon of orgeat, but I really don't know about that either. I need to buy some more Persian Limes and try to recreate it. Remember kids: Anytime you make a truly mind blowing drink, always write down how you made it- no matter how simple it seems at the time, you WILL forget!