For some reason I really liked playing "Final Countdown" on the mellophone. Haven't done it since high school marching band though. Yeah, that's right, mellophone and marching band. But I figured this would be an all-guitar thread and it could use some spicing up.
The adagio from Konzert fÃ¼r Oboe und Violine c-moll. That's what the sheet music is titled, anyway, crazy german people. It's not necessarily the greatest song ever, maybe runner-up, but it was the most fun to play because I did so accompanied by a friend I don't get to see too often who is kickass on the Oboe.
That's on the violin. My favorite thing to play on the guitar is nothing, because I recently tried growing my picking nails longer on one side (so you can make different sounds from nail and flesh ... ) but only wound up ripping one of them off on a piece of scrap metal at work because of it, which isn't pleasant, stupid guitar. I need to engage my brain more often.