The standard D&D implementation of Vancian magic has at least two great things going for it, encouraging spellcasters to think strategically and creating adventure situations via spell scarcity. So my question today is about the effects of alternate spell systems.
Q: What situations do you want to see in play that Vancian magic does not encourage?
I'll offer two answers to get the ball rolling:
A1: I'd love to see PC wizards collapse from exhaustion because they pushed themselves past the limits of their powers.
A2: I don't want players to not know exactly how many spells they'll be able to get off before they run dry.