Negative traits, might be fun for challenge runs, but probably would require special coding,
Extreme motorphobia - You have a fear of vehicles some might consider irrational, both driving and being inside of them, and just being near one is difficult. While inside of a vehicle your morale will drop and you will sometimes panic and act irrationally in your attempt to avoid the metal beast. Understandably, grabbing or piloting such a device might require an extreme test of will and courage.
Junkavour - Through an excessively poor pre-cataclysm diet, you have acquired a disdain for the more mundane foods. You have difficulty keeping anything down that isn’t sufficiently processed or junkfood-y.
Nocturnal wiring - Some people are night owls, others are morning people. You, however, make vampires seem sane. For some reason, you start feeling tired as soon as the sun comes up, and will become heavily fatigued over time if you remain within its gaze. The dark is your life.
Dimension-ally Challenged - You have a horrible memory for layouts and would easily forget where you live if you didn’t write it down. Your overmap no longer reveals normally and you are forced to use found maps and jotted notes to fill it in.
Anti-Sedentary - You believe the only way to truly feel happy is to move on. So much, in fact, that the longer you stay in a place you’ve already been the more your morale drops. Conversely, discovering new places raises your morale.
CBM Rejection - For most people, CBMS were the future of mankind. Trans-humanity through mechanical adaption was neigh encroaching. For you, however, the future was not so cheery. Your body rejects these mechanical blights by having chemical problems, causing rashes, and occasional uncontrollable itching.
Squirrel-y - For most of your life, you felt an affinity for squirrels and their doings, and studied them well. You had just gotten done putting together your latest creation, a fullbody squirrel fursuit, when the Cataclysm occurred. Something inside you snapped at all the carnage and mayhem, and now you can’t bring yourself to live how did before. While you can wear a squirrel fursuit better than most and thus suffer less encumbrance from it, you also suffer morale and physical penalties for not wearing one. You also have become herbivorous and gain morale boosts from woodland-based vegetarian foods.
Food horder - Having lacked and gone without before the Cataclysm, you understand and appreciate the value of having a large supply of non-perishable food. You gain a morale bonus from seeing a large number of non-perishable food on one tile, but will suffer large morale penalties and panic increasingly for day you go without seeing such a thing.
Bigger is better! - You have a very simple need for your post-apocalyptic carnage: Big. You gain a morale bonus from wielding/throwing large weapons/explosives and rather enjoy loud bangs, nearby explosions, and excessive mutilation, but you suffer large morale penalties from being caught near hostiles without such. Spending too long having to get by with puny quiet weapons can lead you along the path to depression, negatively affecting your abilities.
Foot-in-mouth - You have problems socializing and talking with other sapient beings. It’s not that you don’t like the company and interaction, but rather that you often say things that you never intended. When conversing with others, you’ll often choose to say things completely the wrong way and suffer the results. (Ie, you chose “a” in an interaction and the game acts like you chose “c”)
What was that?! - You have a super overactive imagination and a healthy dose of paranoia. Whenever you hear a sound but cannot see a source, your mind starts imagining what it could be. (all ? marks that aren’t in visible area have a chance to create a hallucination monster or terror of some sort based on what kind of sound it is. In extreme cases, this phantasm might start trying to move on/attack/verbally frighten/threaten your character, but will disappear if it tries to step or ends up being on a visible tile)