I did have TaskSwitcherXP on my laptop, which is a fully customisable graphical task-switcher, and is great!
I toyed with the idea of using WinFX's task switcher for ages, and finally did, only to discover it's kind of...well...overly huge and garish and a bit odd really. I'll stick with it, because it makes sense to use my object desktop programs and not fill up my programs folder with random programs that do the same thing, but is it likely the graphical task switcher will ever have more options to be more customisable?