I was initially tricked by the karaoke scene with Chuck and Jimmy. I thought when Jimmy sang, "the winner takes it all..." and got Chuck to join in with, "the loser standing small...", that Jimmy was indirectly poking fun at Chuck. But then they actually had a nice bonding moment.
Jimmy is complicated, which is why the show is great. I think he truly wants to be a good person, but he does not have the fortitude to put in hard work. We all see that he actually has the potential to be a good lawyer, but he is also street smart and knows how easy it is to cut corners. He cannot help but choose the easy, selfish path.
I had a feeling w/the karaoke scene that it would end with Chuck pushing Jimmy aside - which it did, as he wanted the limelight. I thought it was interesting how Jimmy didn't seem to be bothered, and they had the bonding moment again in bed. I thought it showed how Jimmy just allowed Chuck the limelight for their whole lives in many ways... and maybe it's why he's not doing it anymore? It was an interesting scene.