Animated *is* a big fan nod.
"Garbage-In, Garbage-Out" episode is the must for me. Weird Al doing the Wreck-Gar's voice, the TV head reference, "I DARE to be Stupid"...
But we have the crowd scenes with a lot of characters, I guess we all spend some time looking the guys on those scenes. Who doesn't like to see Team Athenia and Team Chaar characters? Rodimus and Cyclonus, many
BW guys...
I don't know why some people hates Animated. It have an original story (Optimus Prime as a "nobody", Autobots controlling Cybertron, many of the Great War related events like Project Omega, etc) with many many many references to other series. So, you can be a new guy and watch the main story and can be a fan, enjoying the main story and the references.
If we go to printed material we got much more homages. This is one of the great things about AllSpark Almanac Books... a lot Animated Universe backstory and references to other Transformers and popular culture series.
Nice that, at least, we still have Allspark Almanac Addendums being published by TCC.