Front intake fan selection.

[OneMoar]

The typical black fan frames and often propellers as well are made of ABS, a common form of thermoplastic that is also used in the auto industry. It resists shock and vibration fairly well. ABS is also the most common type of plastic used for plastic case parts. Often the stylized clear or translucent colored fans are made of a stiffer, more brittle plastic. One review I skimmed through on that particular fan said it wasn't all that quiet either.

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brittle plastic = you will be pulling shards of fanblade out of your skin eventually
brittle plastic also tends to 'rattle' and because the blades will flex when subjected to Resistance they tend to have a lower static pressure (mostly do to them being overly light )