headcanon。

[suitable]

• Peter doesn't pick out the absolutely horrible suit-shirt-tie combos he wears to work 90% of the time. El lays them out for him the night before whenever she's not out of town on business. He doesn't notice the fashion disasters - instead he just thanks his lovely wife for being so caring and thoughtful and considerate.
  
  Neal, of course, noticed (and was rightfully aghast about it) but didn't ask, instead opting to find out on his own (again, of course - it is Neal after all). When he discovered the truth, he and El had a quiet little chuckle about it... And now share subtle smirks and winks when Peter isn't looking.
  
• He hates being alone. He's either to be found with his team, or Diana, or Jones, or Neal (and/or Mozzie), or El. If none of those are an option? He talks to Satchmo. And I mean whole, one-sided conversations of just. Run-on stream of consciousness stuff. It's an adorable kind of codependency.
  
• He's also an only child. Otherwise he'd recognize the protective-slash-exasperated feeling he has toward Neal as brotherly. And if he'd ever had any sisters, he wouldn't be half as squeamish around crying women.
  
• When El's away, he can't sleep. He literally just tosses and turns and stares at the ceiling when she's not there. He tries to cover it up with extra coffee and extra cases to keep his mind occupied but everyone can tell something's off with him. It's not as bad when he knows she's going to come home eventually but. Still.
  
• As much as Peter enjoys a beer or two and the occasional glass of wine, he pretty much never drinks enough to get buzzed, let alone drunk. He mostly drinks for the taste of it and the psychological effect of ah, relaxation. His reasons for this are threefold (four, if you count the fact that it's official FBI policy for agents to never drink while on duty, and agents are always on duty - but practically everyone breaks that regulation):
  
  (1) Getting drunk means losing control of yourself and impaired judgment, thus opening yourself up for stupid things to happen, and Peter cannot STAND stupidity. Especially on his own part, and most especially when it can be avoided.
  (2) Between his job at the Bureau and Neal being Neal, it's a very real possibility for Peter to be called into the office (or elsewhere to save Neal's butt from whatever fracas he's gotten himself into now) at any and all hours. As such, should either of those things happen, he'd much rather not have to show up drunk or hungover, thank you very much.
  (3) He never got into the partying scene in either high school or college since for that to happen, it's sort of a prerequisite to have friends first. And as Peter spent most of his time in school working his butt off and studying? ...Yeah. No. That didn't happen.
  
  
• After the conversation Peter had with El about sparks during In the Red, El bet her husband ten dollars that Sara and Neal would become an item in the next few months. Peter took her up on it, putting his money on Alex instead.
  
• He and El tried for kids a few years into their marriage - they were financially stable enough, had enough time, and lord knows they loved each other enough for it to happen. But for some reason (I'm thinking fertility issues on El's end) they weren't able to. Shortly after this discovery, Peter and El went to the shelter and picked up a yellow lab puppy and brought him home. Hence why El sometimes refers to Satchmo as their son ["You chew like your father" in Pilot; "Satchmo? Where's your daddy?" in Prisoner's Dilemma].
  
• His favorite movie genre: westerns, duh. He's a huge fan of John Wayne and John Ford, but his ultimate favorite? Is The Magnificent Seven. Sorry, Duke, but you can't beat the sterling ensemble cast, the great action, the good-aligned underdogs coming out on top of the bad guy and the odds, and the reminder that the action-y guys are very rarely the ones with happy endings. Because as much as Peter would like to be Steve McQueen? He knows he's better off as Horst Buchholz.