Well I've seen you mention that you've been learning a lot of this as you go, so I guess my questions would be:
1) How much background did you have in coding before starting.
2) What resources would you say would be a good place to start on learning more nitty gritty insides?
3) What was the biggest hurdle for you initially?
1) Well, I started writing tools a while before we started on Wii U, was workin on SMG2.5 for 4 years from like December 10th 2010 before it was time to put it to rest
2) If you wanna learn how it all works, wiiubrew.org and F0F is hosting the PPC 750CL manual for the Espresso processor on their site, it's how I documented most of the SPRs for IDA