By playing one deck so consistently I got very comfortable with knowing what risks to take, when you needed to throw out a vulnerable Scepter, when you can afford to wait for a more assured one, when you need a specific thing on the Scepter to win, when you can throw it down with any old thing just to get some value, when to play as a combo deck, when to play the aggressor and when to play as control
Its totally worth your mana to pay seven for a 6/6 and two 2/1 too, bringing that Titans feeling from 10-15 years ago
If you can counter every Initiative-creature, fine
Iona, Shield of Emeriais banned in Brawl
Cast four noncreature spells, attack for 16, and suddenly your storm deck doesnt need that many spells to combo