@CelestialNavigator
No worries, not every comic can fit everyone's tastes, so it's understandable. I just looked into your stuff too, and it's not really my cup of tea either (although I will say on some of your environmental pictures, your colouring is flat-out stunning).
But yes, if we see the same things and patterns too much (such as my hot headed/cool headed character reference), we do tend to want to avoid them. I've personally never been bothered by a single hair colour choice though. I find that pretty much every colour in the spectrum has been used on characters in all of the media I consume, so I'm kind of desensitized to it.
@Michelle - Haha, I know I'm really putting myself out there by putting my characters with a bullseye on them for other posters here, but I have a gruff, grumbly military sergeant character with rainbow hair and rainbow powers. Painbow is his name. Although to be fair, as I've stated in that thread about why we design our characters the way we do, I originally came up with ridiculous character designs and concepts, and over time, I started to expand on them with personalities and character development that I can really get behind.