The '59 Sound used to be my favorite, as it was the first record I heard by them, but over the years it has became my least favorite, even though it is still an amazing record. Sink or Swim and Senor and the Queen have an energy that can't be topped and American Slang is just huge. Im sure Handwritten is going to absolutely blow my expectations out of the water though.
If the songs on Handwritten are anywhere near as good as "45", it's going to be amazing. They've created pretty much the definitive Gaslight track with that song. The riffs, the lyrics, that fast punk rock tempo - perfect. It's going to be one of those records you play in years to come and still know that shit's about to go down as soon as that song starts.