Identity is really one of the core drivers of "The Cable Guy," for both Chip and Steven. Chip's entire personality could be considered an amalgamation of his favorite actors and characters, and he himself probably doesn't even know who he really is or what he stands for. This is highlighted in the mercurial nature of Chip and his wildly erratic responses and interactions, which are interlaced with quotes from entertainment. Even during the tense standoff on the satellite dish, which sees Chip holding Robin hostage with a stapler gun, he comments on how "this is a pretty cool place for an ending" and references the "James Bond" film "GoldenEye," which also ends in a battle on a satellite dish.
However, one could argue that Steven is also having some issues with identity. The entire string of events in "The Cable Guy" is caused by a failed attempt at a marriage proposal, which saw Steven move into his own apartment in a heartbroken state. Steven, much like Chip, had his identity tied up in another's and desperately sought validation.
