Knuckles, be careful not to pop a nerve there! You're boiling up!
Loving this too much. Along with Sonic's elegance. I love doing lineless as well at some points. I mostly just colour the lineart instead of doing blindly, but that may be a wrong way of doing it. But doing the lines in different colours little by little miffs me off for some reason. But you handled it so well, seriously. ;w;
This days i use more Sai ( i never use Illustrator eewwww )since i have the best control over my line there. Flash i use mostly for commissions when i want a high resolution and the possibility to change the size :>