Lack of time. The one big hurdle that is easy to set up and difficult to dismantle. Once you put it out there it tends to stop all discussion. You will have to defend your statement and few people would choose to argue with you. End of discussion.
What an opportunity missed though. Imagine saying: "I have the time. Now !" My bet is that you will then find the time and get something done. What you say is true, usually is true ... to you. So tell yourself what you need to hear.
As we enter holiday season and things get frenetic we so easily throw out the time excuse. The truth is that there is enough time. We simply have to commit to making a change in attitude. So how about making time this December for painting? Or your other creative work? Set aside time. Make something happen. After all you would not want to be illogical would you?