One thing Red vs Blue does really well is callbacks.
Like. You can tell they were just fucking around at first. But after a few seasons they really started putting so much more effort into the writing and production - they start having actual plot lines, and then coherent ones, and then battle action sequences. And they really make you care about all the idiot characters who you started watching because they were stupid and kinda funny and the episodes were 5 mins long.
And one of my favourite ways they do that is by calling back to memorable one liners - both for comedic purposes, and for emotional moments. The lines land on their own, but they’re also an inside joke for the audience who’s watched the whole thing, so it works on multiple levels, and gives a more weight to what otherwise would just be pure cheese.
I mean. “That was the worst ___ ever. Of all time.” “Don’t say goodbye. I hate goodbyes.” “You ever wonder why we’re here?” Come on, why are there so many iconic quotes from this dumb show? (It’s the callbacks. They do it really well.)