A habit that I have with regards to art is that I keep drawing most of my characters with only one eye. I first started doing this a couple of years ago because I was afraid of messing up the other eye. That was my excuse for a long while, but eventually I actually started to like the way the people looked. A few times, I would try to conquer my initial fear and draw the other eye, because I knew that even if I'd learned to appreciate parts of it, I was still handicapped. My double-eyed characters never turned out as bad as I expected. They definitely looked more complete, but I realise that I felt more for the ones that were half-blind.
However, I know that it is important not to be so set in my ways, especially while I am still learning. I can learn and take in much more if I keep an open mind, unrestricted by old habits and assumptions and am more willing to step beyond my comfort zone. That is why I try to make a conscious effort to also draw a full face more often, and see where I could possibly go from there.
(pictures and drawings by me)