G1 - The whole Desertion of the Dinobots three parter. Mild Dinobots character development lore
G2 - GI Joe and TF crossovers
Japanese G1 - Leozack
Kiss Players - Rosanna is cute af
BW - Besides Dinobot, love how it builds the Transformers as aliens who have lives outside of war and just do space stuff on the side
RID 2001 - The robots in disguise aspect was really fun

Beast Machines - Really good tension

IDW 2005: More obscure but set the tone for modern TF worldbuilding

2007 movie: Starscreams design, personal top 3

TF Animated: The worldbuilding of BW dialed to 11

ROTF: Primes lore and Devastator being a hive mind-esque combiner that could be made by any number of constructicons

DOTM: How it uses past plot elements to advance the story in a believable way, that and more Primes lore

TF Prime: Probably discounting the movies, the highest budget TF project and it shows, hits all the notes of a good show

AOE: The concept of humans betraying the transformers

2015 RID: Very good cel shading

Cyberverse: Best grimlock character wise, great dynamic with Arcee as the Autobot muscle/gunslingers

Bumblebee movie: I like Dropkick i think hes super cute

Combiner Wars: Hot Rod with a mask is kinda cool, wish Rodimus in general had more to differentiate him from hot rod aesthetically

Titans Return: Megatron is funny
Power of the Primes: I like The Fallens Design

Siege: I like the tetrajets

Earthrise: I thought the Ark crashing looked cool
Kingdom: The sound design is really good, also Blackairachnia and Airazors kiss