[Milkshakes]

I've always been intrigued as to what personality types the Transformers were.
Obviously because there are quite a few continuities in Transformers, I decided to select the one with some of the least characters:

AUTOBOTS
Optimus Prime / Orion Pax- I'm pretty sure Orion would've been an Introvert.
Ratchet - For some reason, I partly see him as an IxxJ. Possibly and ISTJ/ISFJ.
Arcee - I can't decide if she would be E or I, simply based on the way she reacted to Jack. Personally, however, I think she's just a stressed Extrovert. ExFx.
Bulkhead - ExxP? ExFP?
Bumblebee - ESxx?
Wheeljack- ExFP? I was thinking ESFP.

DECEPTICONS
Megatron - God knows. Some kind of inspirational speaker? ESTx?
Starscream- ESxx?
Knock Out- I'm going to go for a blunt ESTP. Or
Breakdown- xxxx :3
Airachnid- Grar ExxJ would be my best guess.

HUMANS
Miko
Jack
Raf
Agent Fowler
Silas

 

[Anna Moss]

Hm, I've only seen season 1 of Prime...

But I can do G1 characters! ;D Mostly Dcons; I'm just not as interested in the Autobots, probably because they aren't Rationals developing cool new technologies. Also, they can't fly.

Optimus Prime: ESTJ
Skyfire: INFJ
Megatron: ENTJ
Soundwave: INTJ
Rumble: ESTP
Starscream: ENTP
Skywarp: STP
Thundercracker: STJ
Shockwave: STJ
Swindle: ESTP
Bruticus: INTP (kidding)

 

[CupcakesRDaBestBruv]

No way in hell is Optimus a Thinker.
xNFJ.

 

[Alistor3]

I personally think Optimus is an ENFJ

 

[CupcakesRDaBestBruv]

I personally think Optimus is an ENFJ

Agreed.

 

[Annabee]

(based on movies)

ENFJ for Optimus
IxFx for Bumblebee, infj maybe? He's immature
ENTJ for Megatron