5: Cleanliness habits (personal, workspace, etc.)
It's a goddamn mess. That's all that can really be said. He throws his clothes carelessly on the ground and drops things, tracks mud and monster blood into the house, and never really bothers to do any housework. The only time he ever cleans is when someone forces him to. Otherwise, it's just.. ridiculous. Usually, however, his messes are kept to his bedroom--the H.O.W., where he usually resides, and the rest of the house, are only prone to bearing footprints from muck he's trudged through while working.
8: Favorite indulgence and feelings surrounding the indulging.
Squiggly's favorite indulgence is, to put it quite bluntly, sex. That is not to say he is a sex hound or anything of the sort, but when he does indulge in such an activity, it is one he favors. And not necessarily because of the pleasure--sex is a distraction from his crippling self-hatred and worries, and the proceeding exhaustion helps him get proper stasis without struggling or fearing glitch nightmares. Usually, he feels rather flustered, agitated, and somewhat guilty after indulging in such an urge.. the first two due to pride, and the last due to his self-hatred. He kind've believes that no one should ever have the displeasure of having to deal with him intimately. Links up to the self-hatred, really.
14: Physical abnormalities? (Both visible and not, including injuries/disabilities, long-term illnesses, food-intolerance, etc.)
Well, first and foremost, he has no fucking elbows. Seriously, his arms bend like macaroni noodles in any which way, rather than on a joint. He also has no nose--it's a slightly raised black stripe where a nose should be. His body is also covered in scratches and scuffs, courtesy of being roughed up from all the monsters he's had to deal with in the past.
22: Given a blank piece of paper, a pencil, and nothing to do, what would happen?
He'd probably just scribble on it. Just draw endless loops and squiggles and scratches until he found something more interesting to do. He's not a very creative person.