Awesome Music: While it's not exclusively linked to Bloopers, "Acid for sale" from Sinyps (which featured in many Mario 64 videos from MaxofS2D) is an awesome chiptune banger.
Memetic Mutation: While the fad was short-lived, it did leave plenty of memes in its wake:
Mamaf***er! ExplanationA censored version of Mario's "mamma mia" voice clip from Mario Kart 64 that is very heavily associated with these videos, most notably SMG4.
Naked MarioExplanationA texture edit that makes Mario's outfit the same color as his skin, resulting in him appearing to be completely in the buff. It was also used by SMG4 for quite a while.
So Bad, It's Good: If you're not too picky, some videos can be this in hindsight.
Song Association: "Scatman (Ski-Ba-Bop-Ba-Dop-Bop)" and "Scatman's World" and to a lesser extent Scatman John's music in general, due to being frequently used in various bloopers, particularly early ones.