The monthly variety pack is a great way to try out the four original varieties without having to invest in 4 bottles of any of them before you know what you like. All 4 are complex and interesting without being sweet, with 3 and 4 probably being the easiest to pair with food and 1 and 2 being more enjoyable on their own.
One thing that I'd like to have in the variety pack is the option to customize the selection after the first box - there may be one or two that you like more and being able to create a monthly box that has more of the ones you like would be great.