Sorcerer

Sorcery is practiced by all those who utilize spells, but not all spellcasters are sorccerers.

Those people who focus on the use of spells above any other magic practices are the Sorcerer or Sorceress and as opposed to Witches they do so in an emotionally unattached way. That means they are having a harder time casting whenever they do not maintain an emotional stable almost unattached mental state.
Sorcerers outshine the other magical traditions in their knowledge of spells and their ability to develop, adjust and modify said spells to their will and biding.

They excel in stress-free environments and when utilizing their magic under clinical conditions. When forced into situations where quick action is needed they are severely hindered, often relying on but a very small repertoire of spells in such conditions.
Control of their emotions is a prime concern for them.