Id have to say the 2 biggest surprises for me this year were Vampire Weekend and Arctic Monkeys.
I liked VW's debut quite a bit, but it wasnt great songwriting by any means and had a few fillers. I didnt care much for Contra at all and cant name a song I liked off it because after a handful of listens I could tell it wasnt hitting me like the debut and seemed like a sell out album. I guess that's where the biggest surprise comes for me with them and Modern Vampires since I have liked some of their previous work, but with the new one I felt like theyve taken it to an much higher level musically, lyrically, and just general songwriting. Many songs are quite catchy, but that "cheap" catchiness of the debut is gone as theyve matured and the music has more depth to it. What also surprises me at tells me how great of an album it is, is that literally 7-8 tracks from it could be my favorite from the album on a given day.
As for Arctic Monkeys, never listened to them much. I remember their debut blowing up when I was in college, including in my circle of friends who listened to more indie type music than myself those days. I gave it a shot, but couldnt get into at all and didnt understand the hype. Over the past few months even listening to WPSIATWIN again, as well as the rest of their albums, while there are songs here and there I like a lot, in general they dont do much for me. However, I think AM is fantastic. I guess it remains to be seen with their next album if AM was a progression in their sound or more of an outlier, but I hear so many different influences on it yet it sounds like their own, and the track to track stylings are much more varied than their previous efforts. Im certainly hoping they continue in this direction.
I realize both of these bands are pretty popular and have plenty of fans around here and elsewhere, but just based on my expectations and enjoyment of both bands previously, these were both major surprises for me. I think both deserve all of the end of the year acclaim they are getting, and both are probably in my top 5 of 2013 which I thought was loaded with great albums.