I so hear you on complicated lighting... I just realized how much I love drawing it. Especially with back-lighting...
I also like reflective metal.
I like drawing cute/rounded shapes, even if I swear at myself later when I have to ink it...
I don't mind technology as long as I can draw it in a way that suits my style. I.e. drawing a Gundam would probably suck, but if I can draw a more organic/rounded mech, I'd be fine.
I like drawing hair, even though I often struggle with it. When it comes out right though, it's chef's kiss
I love drawing wide-eyed/puppy-eyed expressions (if that wasn't obvious from my comic).
I love drawing space
I love drawing lips
I love drawing hands even though I'm actually not so great at it. 