I'd like to add these pictures to the original board as Yu is still a Dr. in training and not so kick ass as Asada from Iryuu or Tenma from Monster XD.
Atm I'm not too sure which field Yu could specialise in so I'll just link up a few more pictures to mull over.
Thought I'd add in more Iryuu/Asada goodness just cos it's so ridiculously epic. It's practically the tv show of Trauma Centre.
Oh and let's not forget Scrubs...
I'm going to add that Yu use to be quite jokey before the incident at A&E and his actions really hit him. He also feels that he has to make up for his actions but is still unsure in how to do it.