Here's where things get interesting - and occasionally weird. Abstract designs free you from the pressure of making anything look "right," which is either liberating or mildly terrifying depending on your relationship with control. Mandalas offer the opposite experience: precise, symmetrical patterns that reward methodical work and punish rushing.
Vintage styles bring unexpected colour combinations that somehow work together, while cultural designs introduce you to patterns you might never encounter otherwise. Celebrity portraits are exactly as challenging as you'd expect - turns out getting someone's face right in numbered sections takes more attempts than you'd think.