Well my 2 cents on TF2 :

Lots of Robots but lack of who is who compound with cameo appearances just to be shot at eg. Arcee, just namesake but nothing much except being shot at in the end, the mini-truck that snuggles Megan's leg - whatever happened to it?, Decepticons is worst off - multiples baddies but so easy to dispose off by humans and Autobots, the worst culprit is The Fallen (one of the Prime and just there to be killed off easilly), Autobots - apart from Prime and Bumblebee - who got screen-time? ....

Optimus Prime.. wow.. powered up into Optimus Prime Godbomber.. hmmm. interesting http://en.wikipedia.org/wiki/Ginrai