Hercules is 'The Responsible One'
Hercules is often "The Responsible One" when Jason and/or Iolaus are goofing off. He tries to stay responsible, but often the taunting of his friends is enough to tempt him to goof off as well - often with consequences.
1.03 - What a Crockery
Hercules is on a mission to deliver Zeus's Chalice to Zeus's temple, but Iolaus and Jason talk him into a game of Melonball that distracts them long enough for Strife to steal the chalice.
Iolaus and Jason: MELONBALL! Yeah!
Hercules: No, no, no no! We've got to get the chalice to the temple, all right?
Iolaus: What, you can't handle us?
Jason: I thought you were Mighty Hercules, Conqueror of the Gods!
1.06 - Teacher's Pests
Jason starts looking at the private student records, and Hercules tried to stop him before giving in.
Hercules: Okay?
Jason: Flanicci...
Hercules: Wait.
Jason: Flaenus...
Hercules: Oh. Jason - listen, I wouldn't mess with this if I was you, okay?
Jason: Ahh! Here we go! Pythias Fiducius! As in, 'Back when my boy, Pythias, went to school...'? Let's see if he's the hotshot Big Daddy says he is.
Hercules: Jason... I really think that we should put it back, okay?
Jason: Whoa.
1.13 - Forgery
Iolaus and Jason decide to play a trick by tying the wheels of a chariot to a stationary object, intending to "take that guy's wheels right out from under him". Hercules refuses to participate, "You pick the time. You pick your battles." After Iolaus recovers from being accidently dragged off by the chariot, they continue to argue, Iolaus and Jason continue to encourage the fun and fancy-free lifestyle, while Hercules is the voice of reason.
Hercules: If I had, it'd have ruined some guy's chariot, just 'cause you didn't like the way he talked to you.
Iolaus: It was a joke, Herc. A trick? Ah, man, where's your sense of humor?
Hercules: Well, you just can't go around doing everything you want, just 'cause it's fun.
Iolaus: It's an approach to life. You should try it, sometime.
Hercules: Why don't you try being responsible?
Young Hercules: Cheiron's Warriors
Hercules, Iolaus, and Jason are walking from the Academy to the docks to meet with Cheiron, who is returning from a trip. On the way, Iolaus and Jason start play-fighting with sticks, but Hercules refuses to participate. The delay still causes the cadets to arrive late to the docks, where they find out that Cheiron has been kidnapped - a crime that they could have stopped had they arrived on time.
"Guys, come on, we're going to be late! And if we're late, Cheiron's going to give us That Look."