Here's an important topic for you, what are the most important muscles? We'll start off with honourable mentions as like a three way tie for 5th, and then we'll get into the Top 4.

Mauga from Overwatch flexing his biceps.

5.3: Neck

When you train your back, shoulders, and traps, it should utilize your neck regardless. So if you're jacked, chances are your neck will automatically be jacked. But with that said, when guys love muscles like I do, especially if you've got a deep voice, sometimes they'll secretly go nuts over a thick neck.

5.2: Legs

I love massive legs and a lot of people say the same thing, but actions speak louder than words and I find that's not so true in practice. Having big legs is considered important and will make you look big, but most normal people are biased towards the upper body unfortunately. This is mainly to impress other guys who are big.

5.1: Traps and Forearms

These are two things that compliment an already good physique, it's always a welcome bonus. If you're wearing a shirt and it's hiding the rest of your body, people notice your forearms. This is what will give you a competitive edge over the other guy sitting next to you.

4: Back

Listen, this is serious. If you've got a wide back with fuckass lats, and you're wearing a suit, or a fitted shirt, you'll look absolutely insane. I'd actually go insane if I ever see a massive back rip though a dress shirt.

Something I've learned while playing online games is that people feel safer when their Tank is huge. I find this is true in real life as well, a wide, thick back makes them feel like they've got a big, strong man to protect them.

3: Chest

Here's something that everybody needs to understand, your chest is not too big. Don't ever tell me that you feel like your chest is getting too big, no it isn't, keep working on it.

Huge pecs make you look invincible. This is how you size people up, smile, flex your chest, and you're their new king. No one will dare fuck with you ever again.

2: Arms

Big fucking arms, boom, fuck you, I've got big fucking arms. If someone ever tries to tell you what to do, boom, fuck you, I've got big fucking arms. You ever see big fucking arms? Holy fucking shit. You're not big unless you've got big fucking arms. Boom, get out of my way, big fucking arms.

1: Shoulders

I find that a lot of the subconscious ways in which people judge how big you are, is just how broad your shoulders are. That's the first thing people subconsciously notice about you. That's the difference between simply having big arms, and being a big guy just in general. If you ever see someone with hugely wide shoulders and fuckass delts, holy shit.

A nice bonus, perhaps, is however big you get your shoulders, will make your waist look smaller. I actually love a huge gut, big is big, but this is good if you not only want to look big, you also want to look jacked.

The most important is the side delt, that'll make you look like a superhero.