Hey there! Very nice rig, especially for a second year. You should be very proud . I'd watch some of your skinning- it looks a little blotchy in places, and needs a bit of smoothing. Also with the pole vectors on the legs, most of the time -for at least for me as an animator - i wouldn't have them follow the legs, and have them just on the world movement - or else have it able to toggle on/off. Speed your video up next time! Also, care when you're adding attributes - i usually only go from -10 to 10 as a scale, because although you think it'll give you move fine tuning, it's actually just a pain in the ass to have to keep scroling across the page to get to the extremes of the post. Looks like your indiviual back feathers could use controllers too. And it might be worth thinking of detatching the GUI from the head, and instead having it on it's on camera. This way, you can tear it off and it's always at the right angle to you. If not just parent a camera to it XD, might make things easier.
Right that's it from me for now! Good luck. Looks like an awesome rig, you shouldn't have any problems