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There are quite a few different styles.
Tempo-based (Alex), excessively tempo-based (Paladin) - requires strong micro-management.
Medium-paced (used by most players).
Safe/defensive (Mareti).
And each style has nuances - some prefer to gather as much information and as many strategic points as possible, others accumulate resources, some try to build up their economy as much as possible, while others think about what to fight with at level 121, some prefer to only upgrade their Town Hall, while others have 2-3-4 Town Halls depending on the map and situation, etc.
In principle, after watching a dozen games of one player, you already have a clear idea of their style.
More likely, there will be combinations of styles, for example, tempo-based with a safe/defensive approach.