lol. Many really should take on @rukizzel’s Jago-shadow. If I didn’t know better, I’d say he’s sponsored by Lipton!
Would also like to point out, taunting itself isn’t always an outright disrespect. Quite a few characters just taunt, no more.
Fulgore, now THAT’S an insult! LOVE IT!
Jago insults as well.
… Riptor’s is rather neutral. Not so much a taunt or insult. Especially cancelling into a back-jumping fireball or headbutt.
There’s no denying T-bagging is an insult. Especially between round steeps. The taunts are not always so.
Definitely like the idea of a “no interpreting” respect animation.
Wulf’; he’d do a form of bow due to nobility and dog-like submission nuances. Nothing to make him overly submissive.
Kan-Ra: make a box with a bow with his rags or have him to some pondering pose while saying “Impressive.” Do it twice, “Most impressive.”
Aganos: grow a sunflower. Leave it on the stage and if it gets trampled, he growls and glows his eyes red for a moment.
Jago: Fist in palm head bow.
Orchid: Spin and extend a thumbs-up. “Good job” or something. She is enunciated for a character.
Spinal: Pull out a jack’o lantern and laugh. There’s never a reason to not laugh with Spinal.
ARIA: Can nod her head in approval after a scan. “Fascinating” is something she’d likely say.
Sadira: She’d hold out her hand with a small spider asking in her language if we’d accept her gift.
Maya: Would cross her daggers and bow her head.
Rash: Tilt his head down, pull his glass down slightly and quip “You’re not half bad!”
Cinder: Punches a fist into a palm at chest level and says “You’ve got me fired up!”
Hisako: can do a form of bow supported by her weapon.
Glacius: grow a large ice hand giving a thumbs up.
Fulgore: stand at attention, one arm crossed over chest, retract blades. “Fulgore” as though recognising at least equality in ability.
Riptor: She can give of a reptilian howl followed into a shallow bow with a snort.
TJ: Sign an autograph, toss it on the ground. Dan and Johnny do it. Yes, TJ would jump off a bridge if it got him on TV.
Shadow Jago: Taunt should be turning his back to the opponent and snarling in disgust. The respect should be a be a flaring of shadow energy from his head and fists while showing a sign of anger followed into the ready stance. Can’t ask for too much respect from such a being 
Omen: Remove the mask. The mask is a mockery to us all. Removing it is his way of saying “You are worthy to gaze.” To him, it’s a big thing.