I enjoyed RID... I also enjoyed how it didnt take itself to seriously.

Having met Steve Blum and having a few drinks with him I have to say that I like Dark Scream and W.A.R.S.

Some of my other favourite characters are Sky-Byte, Side Burn, Scourge, Ruination etc...

Sky-Byte is just awesome... I love his hikus and I love how he did his online personality test and he was a jelly fish, it still makes me laugh.
Side-Burn the loveable larrikin
Scourge and the Decepticons... Who doesn't like good guys turned bad.

Others that I didnt like as much just because they weren't used very well or very often are Skidz and Tow-Line.
For me Skidz was a wasted character just wanting to race all the time I feel that they already had the slacker in Side Burn who would go of chasing red sports cars, while I found Tow-line to be pretty boring.

I also got annoyed that children (Koji in-particular) could control Fortress (Brave) Maximus however it was worth it because Brave Maximus was the first "Fortress Maximus" mold that I own.