Any Perceptor headcanons? Also Ark/Teletraan or Metroplex. :P
Heh. You talked about how your Brainstorm doesn't believe when people flirt with him?
Perceptor, for both Eterna and TFA doesn't know how to flirt. Eterna Perceptor understands the existence of flirting, but despite all his brilliance, that is a skill he has never quite managed to master. To him, 'flirting' consists of intense mathematical debates or very deadpan sarcasm, so...it's somewhat difficult to tell if he's being normal or if he is trying to make someone realize he is interested in them. The one true 'tell' he has is if he starts talking in-depth about the stars. He may be a microscope, but he is an astronomer, and it is his first passion. He doesn't share that passion easily.
TFA Percy, on the other hand, does not even understand the concept of flirting. He understands love and lust, despite what some people may think, but flirting does not exist. It is not a skill to be developed, the very concept is so alien as to be nonexistent for him. (Yes, even after Brainstorm 'fixes' him by putting his personality back into place. It didn't exist as a concept before Percy removed that part of his own processor.)
Going back to Eterna, Perceptor very, very rarely uses his alt-mode. He only does it when someone asks him to, for his degree of precise magnification and focus as a microscope is unparalleled, but he does not go into his alt easily or, truthfully, all that willingly. Spending more than 10 minutes in his altmode gives him crippling back pain and a migraine with such intense light-sensitivity that he can't function for the rest of the day afterward. He also has not told anyone this. It used to be bearable, until the Decepticon boarding party on the Ark that shot him in the face and made him lose his eye. Now it is not, and if he can get out of transforming, he will.
Ark and Teletraan, huh? Well, first off, for a very long time, not many people realized that Ark and Teletraan were actually two separate bots. It was 'common knowledge' that Straxus of Darkmount had commissioned hotspot Sparks to be nurtured into Vanguard-class Titan frames, to create an army of spaceships that would carry him and his elites of Praxus off of Cybertron with all the wealth they could carry, leaving the planet to its fate. These bots were supposed to be held as slaves via a computer installed in their bridge, which would allow them to communicate with the much smaller bots that would crew them. For most of the Arks, this was true.
For Ark-23, named Arcturius (though he just goes by Ark, honestly), this was not the case, as a rogue hotspot Spark landed into the frame of the computer that was supposed to enslave the newborn Vanguard Titan, and became another bot entirely, named Teletraan-1. This nullified the slave-coding, and Teletraan became Ark's City Speaker, so to speak, and grew alongside him as a constant companion that no one knew about. Everyone assumed that Ark-23 had designated himelf Teletraan, as all the other ships had given themselves names to differentiate between them, and this was allowed by the slave-coding. Teletraan and Ark thought it prudent to not correct anyone...until Straxus, an active Decepticon sympathizer (because it served Praxus's interests) BUT more interested in saving his own skin than helping any 'cause', began actively planning to leave.
They were going to run away, until a small contingent of Autobots managed to sneak through the Praxian security in Darkmount and stole Ark and Teletraan out from under Straxus' nose. Unfortunately, the Autobots didn't know that Ark was a sentient ship; they thought he was a regular ship with Teletraan being an enslaved Cybertronian bound to the ship. They thought all of the Ark ships had been such, as a Titan-class Cybertronian had not been naturally born in millennia. Eventually Ark and Teletraan told them. Uh. Via...waiting on everyone to leave for the day and having Ark transform into his bot mode to wait on them to get back, while Teletraan waited on his shoulder.
Needless to say, THAT was an interesting conversation.
As for Metroplex, you get a shortie because I have done WAY TOO MUCH RAMBLING ALREADY. How did this get so long?
Anyway. Metroplex has synesthesia. Diagnosed by medics, and that is one major reason the tiny sparkling, not even old enough to be a youngling yet, named Windblade from Caminus was assigned as his City Speaker when Cybertron made contact with Caminus, as she also has synesthesia. The other major reason is that Metroplex and Metrotitan, the Elder Twins, were and ARE the largest of the 13 Legendary Titans, and Windblade is such a strong telepath, that despite her age (or perhaps because of it, as she was branded as a City Speaker at the equivalent age of four) she was the only one that stood a chance of being able to interpret Metroplex's speech without immediately having her brain boiled from the sheer immensity Of Him.
Metroplex honestly prefers communicating via colours and sounds and moving shapes, as actual speech and letters for text communication is still incredibly difficult for him, even after he's managed to heal as far as he has. He still has a long way to go, and straining himself slows down his recovery. Thankfully, his incredibly young City Speaker understands his 'colour-language' just fine, as do both of her triplets, thanks to their connection with her, and Metroplex does not have to strain himself to speak to his charges very often. It's genuinely helping him heal much faster than projected, to the point that he is able to actively look outside his own Speaker Chamber now to watch his charges (the bots living in his cityscape) as they go about their daily lives. He takes great pleasure in watching the tiny cadre of children get into mischief, and, unbeknownst to any parents of said children, sometimes actively encourages their mischief himself via a message sent through Windblade, Sunstreaker, or Sideswipe, depending on which of the triplets is closest to his Speaker Chamber at the time. He enjoys watching the kids get to be kids.