I was hesitant to make a caster, to avoid being the special snowflake who knows the setting, and the rules, and the GM, and oh hey is also playing the wizard so fuck everybody else. But once I got working on the character, I liked the feel of alchemist and practicing a mundane form of magic with chemical equations rather than a mystical gift. Being an outsider to magic and trying to neatly categorize it fits the concept I was going for better.