Thanks for the comments guys!
I am happy with it and proud of what I've done as it is easily the best painted single mini I've done to date. I could have done the metal better given more time and I'm not entirely happy with the glass, liquid, armour or gauntlet. Still, I shall indeed learn from where I went wrong and use this as motivation for my entry next year.
I don't yet have the skill to paint a single model to a high enough standard but I'll be giving a squad a go. Current plan is 10 Legion of the Damned wuth blue flames and a generally cooler tone to create a more different, ethereal look. Of course, depending on when the Eldar get updated and what their models are like I may end up doing them and I have a feeling some new Dark Eldar special characters could tempt me into doing a single mini again.