Letters were given out randomly, though I personally took Ñ since I wanted to do Spanish words for my letters. They were supposed to be humorous or offbeat in some way (not your standard A for Apple) and to me, Spanish sounds more phonetically humorous than English.
Q is for Quiquiriquí (key-key-ree-KEY) = Cockadoodledoo
Ñ is for Ñau (gnyow) = meow
I started out knowing EXACTLY the colours I wanted for the cat... and nothing else. And then I said hey, let's just use the same colours on all the letters. It may not seem like it but the rooster was the hardest of them all to figure out in terms of colour and I'm happy his worked so well in the end.
These are the original sketches: