Christmas Day 1975, my Mother (God rest her soul) gave me my first bass guitar and amp. For the longest, I would her a really great song, and just say "I can't play that," and go back to easy stuff. Today, I put on a song that made me say that when I was about twenty. The song is "Brazilian Love Affair," by George Duke with Byron Miller on an incredibly funky P-bass.
It's funny playing along today, because it is pretty doggone easy now.

I even came close to getting all of the solo by the second take. I am not a great player by any means, but it is nice to know that I have gotten somewhat better over the last thirty years.
George Duke - Brazilian Love Affair - YouTube
Here's one that I actually tried to play, but it was a bit tricky. I can play it now but it still is fairly tricky timing:
http://www.youtube.com/watch?v=unBfb2syL18