Send ✿ for a HAPPINESS headcanon.
This one is complicated. Blurr cannot feel happiness anymore. He feels satisfaction and content. But, he will never say the words, “I am happy.” Because he never will be. He’s taken it away from himself and won’t allow him to feel the emotion ever again. It’s a subconscious thing, as he’s not aware that he’s doing it, but it is all in his unknown control. If he could learn this, he would be able to sort himself out. Sadly, that part of his processor was melted away by the injury. Therefore, Blurr cannot control what he should be able to.
He feels close to happy when he’s either alone with Optimus or when he was with Roadbuster (when he was alive anyway). Blurr feels close to happy when he’s around people who actually value him. Which, at this point, are pretty much Optimus and Drift.
He also feels “happy” when he’s cutting someone apart with scissors and knives.
Back in the day Dodge would come back home to see a tired Blurr. He was tired to but Dodge would go up to Blurr hug him, kiss his helm and just help him relax by either helping Blurr with work or giving him a massage. Anything to help him relax.
[[ This is actually 100% accurate to what that stupid bot would do for Blurr. He’d come home dead tired from work and Blurr would be dead tired and instead of sleeping, Dodge would make him something sweet to chew on and then massage his shoulders. He spoiled Blurr, but Blurr spoiled him, too. ]]