The Ace: He won five individual challenges(three immunities and two rewards), and even when he didn't win, he still got to go on most of the rewards as a tag along. Jeff lampshaded this when Lex won the reward where he got to go to the Massai Mara National Reserve
Jeff: It seems like every time I turn around, I'm handing you something. Now I'm handing you my Visa card.
Berserk Button: Teresa voting for him instead of Clarence gives the viewers their first real glimpse at Lex in a much less flattering light than he'd been portrayed before that point; he goes into a paranoid rage, vowing to figure out who voted for him and get rid of them immediately (and doesn't even get it right).
The Charmer: One of the reasons he was so threatening. Most of the contestants who've played with him have said that he's very persuasive and likable when he's not too busy being a paranoid Jerkass.
Idiot Ball: During the merge, Lex gave up a 6-4 lead for his Boran tribe by voting out Clarence, and almost gets voted out himself in the next round because Kelly was sick of him and wanted to defect to the Samburu's. In a very close vote(5-4), Kelly left instead of Lex, but only because Brandon was holding an even bigger one by becoming a defector to Boran.
Ineffectual Death Threats: He threatens to (literally) slit the throat of whoever votes against him at several points(to be fair though, one of these threats was during a confessional). Thankfully, he never follows up on any of these threats.
Expy: Slightly subverted. She was clearly cast to be a Tina Wesson type character, and while she was to a degree, Teresa had enough individual quirks and genuine sweetness in her, to make her a unique character.
Southern-Fried Genius: In terms of game strategy she was deceptively cunning and never stopped trying to come up with ways to break up the Boran alliance even when she was the last Samburu tribe member left.
Crazy Survivalist: In one episode he said that if he weren't playing the game for his friends or family, he would dump all the water and food that wasn't his own so the younger, brattier members of his tribe would suffer. Also, in one interview post show, he said he regretted that he wasn't able to hunt on the national preserve they were stranded in.
Hidden Depths: Both supported and subverted. Frank at first came off like a two dimensional Fish out of Water curmudgeon with conservative values, but in later episodes it was obvious that there was a lot more nuance to his personality (like when he waxed philosophic when he watched the sunrise).
Odd Couple: Brandon and Frank during the drive in movie trip they won together.
Smug Snake: Seemed deeply confident that he had a good mind for game strategy, and then he made probably the stupidest move of the entire game by turning on Samburu and joining Lex (whilst at the same time confirming to the other' members of the Boran alliance that he wasn't trustworthy at all).
The Quisling: He prevented his Samburu tribemates and Boran defector Kelly from having a shot at voting off Boran leader Lex out of a petty dislike for and refusal to work with Frank. He was then promptly voted out by everyone except for Lex.
Genre Savvy: Listed "Manipulating men" as one of her hobbies. She actually does not do this in the show and is a decent person - in fact the only reason she put it on there in the first place was so she would get cast.
The Atoner: By the time he got voted out in 10th, he'd more than redeemed himself for his earlier transgressions regarding his appetite.
Big Eater: Half of Clarence's story arc revolved around him being hungry all the time and eating food whenever he could get his hands on it.
The Big Guy: The reason why he wasn't voted out after eating the Beans is because he was capable in challenges unlike Diane and later Jessie.
Black Guy Dies First: Subverted in one episode when Clarence is almost stomped to death by an elephant after said elephant walks into the area Clarence was defecating in. Also could be seen as Toilet Humor.
Asshole Victim: Fell victim to a major twist, had his entire new tribe pretty much conspire to take him out by all but throwing an immunity challenge to get rid of him, and since it was Silas there wasn't exactly a huge uproar from the fanbase.
Cosmic Plaything: In what is perhaps the ultimate example of Hoist by His Own Petard in Survivor, Silas was the first victim of the tribal swap, a twist he never could have predicted. What's worse was that the swap took place only a week after he betrayed the people he initially aligned with so he could be the leader of Samburu, and the people he got stuck with were the very people he betrayed!
Dead Star Walking: Jessie had one of the highest pre-show scores in the popularity poll on CBS.com, and was one of the players the commercials focused on most. Needless to say, her popularity dropped dramatically after the first episode showed her being sick and unable to actively compete in challenges and plot strategy back at camp.