I have ordered everything from special blends (valentine's day blend, a tongue in cheek flavor profile of strawberries and chocolate) to Guatemala to Ethiopian to their holiday blend. Because I use it for my business we go through a lot and I can cycle through everything. I usually buy the 2.5 pound bags for myself. Umm, I never got decaf...
Regarding what I might recommend, I suggest ordering based on the flavor profile you want. They list them on the website. I personally believe that any coffee should be made as espresso or however you enjoy it. That's what I do. Guatemala is one of my faves, but I like verything I have purchased from Sterling.
There's something about high quality beans, and that's what I get from Sterling. There's no compromise on quality, in my opinion. The guys at Sterling know what they are doing. On the negative side I've experienced a couple delays in shipping where they didn't send coffee for a week, which is a hassle for me because then we have to track down why the order wasn't filled and I have to buy some local roaster coffee to fill the gap. But that happened maybe twice in the past 1.5 years and I order from them a lot; and they have made efforts to discount or ship an extra bag or something (I don't ask for anything) to make it right. Their coffee makes it right enough, I love it so much!! I don't have a special account or anything, I just order through the website.
Sterling is fantastic, I guess I'm a big fan, ha ha!