I prefer a more plain look in contrast to some people who look like bloody Skittles on the mountains.
If I go for a bold bright colour it's going to be just one piece of my outerwear.
For instance my Pow setup consists of white pants with bright orange/red jacket.
My park setup is this years FD suit, considering the busy pattern I went for Black and white to tone it down a bit.
It's of course your own preference, but i.m.h.o. you don't need to look like a rainbow to stand out.