[Spoke]

The one thing that will make me flee a mud is the colour.

If upon logging in you are assaulted with colour (or even during character creation) and there is no obvious way (help colour, or similar) to tone it down I just leave.

If players can use arbitrary colours in public channels, SPECIALLY if they have the blinking colour code option, I leave.

I player titles can be customized to have blinking colours, I leave.

If anything blinks I leave.

Most anything else will have me sit for at least the introductory part of game-play, exploring the main town or equivalent and wandering around. I tend to play for several hours at a time, and being able to control the impact on my retine is of outmost importance to me :P