I think there are many ppl who enjoy sticking with one avocation, one vocation. You might not be one of them, and that's fine. Many people also go from one avocation, to another, depending upon the mood etc. (Making "avocation stations" in their home, so when the urge hits, it's all set up already.) Look at all the ppl who are "jack of all trades and master of none."
Maybe once you do get past the guilty feelings, you'll realize how many gifts you have, and that you are allowed to use them as you wish, when you wish... and have fun the whole time (regardless of what you are doing!) TC