Originally Posted by Fee
I was on a Cosmopolitan thing for a while, but the last time I had one it just seemed too sour.
Well, the original cosmo was designed as an aperitif, so it really should be on the sour side. As with any drink where you balance sweet against sour, of course, it's there are subjective factors like drinker's stated preference and bartender's judgement call. Personally if I am mixing, I would always err on the sour side. A little too much lime and "hmm... it's a little sour", but a little too much Cointreau and the drink is ruined (undrinkably sweet). Just a thought from "semi-pro" of mixology yours truly...