The Speed Demon: Solves the first problem in 2 minutes, then disappears.
The Debugger: Spends half the contest fixing one off-by-one error.
The Code Golfer: Writes solutions in a single unreadable line of code.
The Rating Enthusiast: Cries or celebrates for hours depending on the delta.5.
The Strategist: Spends 90% of the contest figuring out which problem to solve.
The Meme Lord: Writes problem comments or variable names as jokes.
The Optimizer: Finds a $$$O(\log n)$$$ solution for a $$$O(n)$$$ problem unnecessarily.
The Tester: Runs stress tests even for the simplest problems.
The Philosopher: Comments on the beauty (or lack thereof) of a problem's logic.
The Perfectionist: Refuses to submit until every edge case is covered.
Which one are you, or do you have a new archetype to add? Let me know in the comments!