Trevor uses threats of sexual violence in order to show his dominance over other men, as well as enjoying making them uncomfortable. Many of his sarcastic remarks have been misinterpreted as sincere statements by players. He seems to take it a step further with Floyd, as there are many things that suggest a sexual relationship. Notably, if the player switches to Trevor during his stay at Floyd’s condo, sometimes Trevor can be seen looking over Floyd as he lays in the fetal position wearing women’s clothing, uttering an apology to Debra while sobbing. However this could just be Trevor showing his dominance by humiliating Floyd. Also, if the player chooses to catch Ralph Ostrowski, Trevor implies that he sexually abused men while in prison. It should be noted that this behaviour is only present when in the presence of weak people such as Ron, Wade, Floyd, and a meth addicted Johnny Klebitz.
By the other hand, he respects and encourages bravery on his friends and partners in crime. During job preparations, he often tends to taunt and call out anyone who shows a sign of doubt, fear or weakness, and when they get back angrily at him, Trevor applauds and approves their reaction as a way to man them up.
In direct contrast to his erratic and chaotic nature, Trevor also appears to be highly intelligent and somewhat cultured. Although seemingly lacking of refined tastes, Trevor speaks in the most eloquent manner out of all three protagonists, utilizing elaborate and complex vocabulary as well as displaying a surprisingly dry wit. It must be noted that having studied 4 years at a military academy, Trevor is the only GTA protagonist to date with a college degree, possibly explaining his use of complex vocabulary and hinting at a sophisticated nature that he might or might not be intentionally masking. Trevor is incredibly focused and professional on the jobs at hand, displaying a surprising capacity for calculation and planning, even under duress and in highly chaotic situations. He can follow the plans strictly and also he has proven to have great ideas for big jobs and lead them successfully, These include stealing the drug stashes belonging to many dangerous groups and stealing a multi-million secret weapon from a heavily armed security group. However, these operations were failures since they lacked a prior careful inspection and were performed hastily (one being a police sting, the other putting the crew in extreme danger worldwide).
Trevor has shown a number of hints that he feels sexual attraction towards men too, besides his normal sexual dominant behaviour towards weaker men. He showed certain interests in the “stag do running man” random encounter. In the mission I Fought The Law, Trevor touches the private parts of one of the guys as he’s dressed as a police man. During a drinking outing with Franklin, he admits he has previously performed fellatio on men (I’d rather suck a dick than smoke weed… and trust me, I’ve done both!). In another conversation during an outing with Michael and Franklin at the same, time, he admits he’s bisexual after Franklin asked him whether he’s gay or not.
Trevor is shown to be disgusted by racism, misogyny, as well as self-righteous and hypocritical attitudes which he considers “fake.” He criticizes the Minute Men and the LSPD for their racist behaviour, reprimands Wade for his remarks toward Ashley, and threatens Martin for mistreating Patricia. After torturing Ferdinand Kerimov, he mocks the FIB’s use of torture as a means of interrogation, claiming it is only a method of showing dominance and that the government fails to admit this.
While it is never stated in-game, Trevor shows textbook signs of Intermittent Explosive Disorder; a mental condition which includes episodes of impulsive behaviour that could result in serious damage to anyone and anything around them, aggression grossly disproportionate to what provoked it, and episodic violence that cannot be categorized with any other existing mental and physical medical condition.
Trevor also appears to suffer from Coulrophobia, since in Grass Roots mission for Barry, dialogue suggests that Trevor once was or still is scared of clowns, saying such things as “I’m a big boy now” and “you can’t hurt me anymore” (paraphrasing). He might also ask the clowns “Are there any more sex offenders out there!?” This implies that as a child Trevor was sexually assaulted by a clown when he was young thus causing his fear of clowns. Additionally, when you get Lamar, Franklin, and Trevor to hang out together off mission, Franklin will mention he’s sitting next to “Two Clowns” (Trevor and Lamar) Trevor then starts to get a little worried asking “Clown? Where?!” which may prove he is still scared of clowns.
Although very rarely seen in game, Trevor appears to be secretly ashamed and a bit scared of his personality. When hanging out with both Michael and Franklin simultaneously, Trevor might reveal in an ashamed tone that he doesn’t want his mother to see him like this. If Trevor hangs out with Lamar enough times, he will admit to Lamar that sometimes he realizes how he’s thinking (fixation on violence, horrible brutalities etc.) and gets scared of himself. If Trevor huff gas on his trailer porch, he may sometimes mutter that he feels suicidal. This could hint that all the reckless stunts Trevor commits (such as flying a crop duster inside a cargo plane while getting shot at with an RPG) might be subconscious attempts of getting killed. When drunk with Franklin, Trevor talks about being lonely and asks Franklin to hold him. When Franklin replies with jokes, Trevor starts crying; “Why are you joking!? I said I’m lonely!”.
While Trevor is often controlling, loud, and willing to hurt anyone who he perceives as a threat in some way, whether physically or mentally, he is terrified by his mother. Upon meeting her in his trailer in the mission Mrs. Philips, he speaks incoherent sentences, is unable to answer questions and runs off to do the job she assigns to him without questioning it.
Trevor is also extremely talented at mathematics. According to Wade, Trevor is “really good with numbers” and can solve even the most difficult of math problems in his head in a matter of seconds without much, if any hesitation as seen in the Depository heist.
PS.
I found something new or I just have never seen before. Michael is 1.88 m and Trevor is 1.86 m, the truth is Michael is taller than Trevor, I am so wrong.