- Designated Villain: As a result of the extreme X-Pac Heat he had, he would always be considered the bad guy even when he didn't do anything wrong or remotely villainous during a match. In 2000, X-Pac had a tag team match with Road Dogg against the Hardy Boyz. During the match, Lita actually interfered and attacked X-Pac to the wild cheers of the audience even though up to that point, X-Pac hadn't even done anything heel-ish at all. Under any other time or context, a female valet interfering in a match like that against a wrestler would have been considered the evil heel. However, because this was X-Pac during the height of his infamy(and Lita during the height of her popularity), there was absolutely no chance for X-Pac to be seen as the innocent victim even though he didn't do anything bad and Lita was the one who attacked him without provocation.
- Growing the Beard: Literally and figuratively, as he became Syxx in WCW and then X-Pac in WWE.
- "Funny Aneurysm" Moment: In his very first promo back in the WWE in 1998, he says he's there to "rip ass." Waltman would later do just that—literally— many years later in an infamous incident.
- "Holy Shit!" Quotient: For a time in The '90s, the 1-2-3 Kid was the resident high-flyer in WWF, doing crazy suicide dives and moonsaults before the company really appreciated that kind of thing.
- Replacement Scrappy: For Ray González in WWC. Not even putting Carly in the ring with him could get a positive response.
- Rescued from the Scrappy Heap: In 2012 he shaved off his beard, returned to the 1-2-3 Kid gimmick and worked several matches for Chikara. He busted his ass in the ring (earning some well deserved "He's still got it!" chants from the fans), put over indy star El Generico, and afterwards left a letter in the Chikara locker room thanking them for giving him the chance to work for them and that it was the best time he'd had in wrestling in a decade.
- The Scrappy: One of the most notable Scrappies in the history of wrestling, so much so that he named and codified his own brand of Scrappiness: X-Pac Heat.
- The Woobie: Regardless of what one may think of his WWE tenure, Sean Waltman is this in real life. When he was young, he grew up with a single mother and was molested several times. And in addition to having a lot of drug problems throughout his life, he's also attempted suicide on multiple occasions. Say what you will about X-Pac but Sean Waltman, the man, has most definitely not had an easy life.
- X-Pac Heat: Well... obviously.
YMMV / Sean Waltman