You’re a legend mate, I’m using the logo work to get to grips with illustrator. I really like the direction these go in and if you are okay with it I will incorporate some of this in my blind flailing attempts at design.
From a design perspective, try to be more bold with the wording. As in Sonic's designs, the wording is defined and easy to read. When logos use a wishy washy, stringy font, they can be frustratingly difficult to decipher especially when they get a bit smaller.
'As long as there's, you know, sex and drugs, I can do without the rock and roll.'