Meta: When a fan at Power Morphicon asked Steve Cardenas (Rocky) if he regretted being written out of the show, he said no. Why? Because he wouldn't have gotten to meet Blake Foster (Justin) otherwise.
Also, the Word of God given around the time of Operation Overdrive that the reason Rita and Zedd were Put on a Bus was because they were taking maternity/paternity leave and wanted to spend as much time as possible with their son.
When Bulk and Skull's invisibility wears off at the end of "Stitch Witchery", Lt. Stone is overjoyed to see them again. Sometimes Bulk and Skull did drive him nuts with their incompetence; but in spite of everything, he seems to have developed paternal instincts towards the two.
A rare Fridge example of this: packages are being stolen from Bulk and Skull's new delivery job, and they're worried they're going to get blamed for it. T.J. instantly comes to their defense and offers to help them do a stake-out to find the real thieves (which it turns out are connected to Divatox). T.J., mind you, has only known Bulk and Skull post-Character Development. He knows they're good enough guys that they'd never do such a bad thing, and it turns out by In Space that he's right.