Fireball vs lightning bolt

[Bargle]

I have always found that Fireball seperates the men from the boys. Knowing exactly how fire expands in dungeon surroundings has helped me to clear entire dungeon floors of pesky female clerics with merely the use of one spell.

Lighting bolt, on the other hand, just shows everyone whether they can scam you at billiards or not.

 

[Jack99]

Lightning bolt, because you can bounce it off the walls and zap them twice.

This.