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I'm not crazy about how the circle at the top of the key was designed at the
Coliseo de Puerto Rico, home of the
Puerto Rico Tip-Off college basketball tournament (the screen capture is from the Dayton-Georgia Tech game, the larger set of highlights of which can be viewed
here).
For one thing, many college courts no longer even depict the semi-circle inside the free-throw line (i.e., the key is a solid rectangle, as seen in this
example), because the held-ball/alternating-possession rule has eliminated the possibility of a jump-ball in the free-throw circle. Also, I find a white free-throw stripe on a light wood floor hard to discern, sometimes.
On the other hand, the unusual key give the Puerto Rico court some uniqueness, which is sadly missing from a lot of other courts.