The answer is the last option- you should never accept any of the above reasons for not trying something new.
Because in order to keep your creativity at a creative level it is important to always try something new.Trying new and new things helps ones mind active and keeps your brain on always on a learning mode.One should never discourage himself before even trying out new things.Being creative is following the road which is less travelled ,trying something out of your set zone is what helps you to create something new , standing in a line does not make anyone creative rather than standing in a line ,try to make a one for you.
Researchs and studies show that a person mind generate some fantastic ideas or create some unusual concepts in night more than during day time ,people those to stay awake late in nights are considered more creative and artistic in nature. Human brains are most creative between the time slot of 2 to 4 in night.
Thus in order to revive your creativity you just need to be enthusiast , no one knows what million dollar plan might come from your brain at any point of time.