I vote for carpet as well...
Either hotel/commercial (Needlefelt), or a really tight low pile. (Berber)
It can get really loud really fast with multiple pins in an small-ish room with wood or tile. (At least with my volume levels! )
I also would go with a grey or slightly darker shade to hide dirt...
Gweem's choice is awesome! lol.
I will raise it with the "Planet/Rainbow" motif!
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If they made the geometric 50's/60's shapes in a darker color, I would be all over it!
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