In Super Mario 64, two particular Lakitus known as the "Lakitu Bros." do not serve as enemies, instead of becoming important characters. As self-proclaimed "seasoned cameramen", the Lakitu Bros. are tasked with filming Mario live on his latest journey: the Lakitu Bro. holding the camera could be rotated and zoomed around Mario with the C-Pad, allowing better camera angles during gameplay. The Lakitu we know from SMG4's bloopers is likely a parody of or reference to these characters. Lakitu, it seems, has grown tired of filming Mario's idiocy. He is quick to make snarky interjections to anything Mario says, rather than giving game advice as the Lakitu Bros. did.
Lakitu is a snide, sarcastic techie who seems rather fed up with not only Mario but also his current occupation. He is also a nerd and has much knowledge about technology, cameras, and photography in particular. He also seems to be pretty lazy/inconsiderate himself, as shown in Super Mario 64 Bloopers: Mario at the Olympic Games, where he forced Mario to train for the Olympics to get a 1,000 cash award for him against his will (rather than simply entering the Olympics himself).
In the episode Super Mario 64 Bloopers: Darkness Takes Over It is confermed that Lakitu is a Nerd/Engineer.