Either that you have a full-time job, contract-based or purely freelance; as designers we should always make room for personal/experimental projects. There's a ton of reasons why it's a great thing to keep that healthy balance with your creativity, your will of making things and finding ways to get away from boredom and eventually burning yourself out. KIDMOGRAPH is a great example of someone who always finds time to explore and keeping his goals on target.
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KIDMOGRAPH aka Gustavo Torres is a Art Director and Motion Designer based in Argentina. His work is purely a series of personal experimentations, tests and for the fun pleasure of making. Check out his Tumblr as he so dear called it:"Art Blog from year 2583".
For more information check out http://kidmograph.tumblr.com/