I don't try to pick favorites a lot when it comes to music, mostly because I just can't choose. For me then to say a song is one of my favorites certainly means something. Right now I'm talking about "Saro" by Samamidon. It's one of those that I think I could put on repeat for an hour and not be sick of it.
And in finding the video for that, I ran across the band Pomplamoose. Give them a listen too.