Lip bursting into The Jockey to save Ian from marrying into the Maguire clan.
Lip: Call it off! CALL IT OFF!
Marty effectively cremating Craig's father.
Marty: Everyone should go how they want to go
Possibly a Crowning Moment of Heartwarming, Awesome and Funny mixed in to one.
Sheila: "This is a normal family home." Considering the context of the line, awesome!
Frank talking Tom out of killing himself over Debbie.
In the American series:
Carl using his bat on a guy that held Lip out a window.
When Sheila Jackson has partially gotten over her fear of being outside. Her reason? To get Liam back inside the house after he had wandered outside.
She overcomes her fear even more when she chases her estranged husband out of the house after he drives their daughter into a sobbing, destructive rage.
Fiona not merely chewing out her own mother for abandoning them but also for trying to take Liam away as well.
When Sheila cusses out Peggy Gallagher during Karen's party. Sheila asks Peggy, "Why did they let you out? Because you're a loud, mean vicious bitch" and then shouted, "you've got a demon mind and a devil's womb!" ...At which point Peggy pulls a gun.
What makes this even more awesome is that only a few days later Sheila let's a sick Peggy stay in her house and takes care of her as she is dying. She does so out of pure kindness and Peggy even apologizes for her earlier bahaviour.
Sheila stealing Karen's baby from the hospital after the would be adoptive parents copped out.
Tony's partner not deciding to bring in Sheila on kidnapping charges in the Season 2 finale.
Estafania attacking Frank with a frying pan after he attacks Ian, ranting about aggressive men like her abusive ex, Marco. The sheer catharsis of that scene, both for her and for the audience, due to how they're likely infuriated with Frank beyond the point of forgiveness by that scene, is incredible.
Veronica going WILD and getting Cheryl to sign her and Kev's divorce papers after Cheryl calls Kev a stupid piece of shit.