I once heard that if you feel exhausted after doing art work than it was good for gaining milage - once you feel refreshed and energetic you experienced what people call "a flow". Which is a real good feeling as you certainly know. To get milage it's a long long way. Like starting the first apartment and getting used to cooking. After years of practicing food preparation it just comes naturally.
Indeed, not a bad idea to put your drawing online to discipline yourself:)
Would you like to become more skilled in what you usually consume through gaming and be also a creator of avatars and characters? I think this is a logical step.
Your dragon looks fine so far. Have you worked on it more?