When you transmog...

[Sliippy]

I like my cm set and a few other older DK tier sets. But, lately I've stuck to CM Set and my eye patch. I'm using the normal slicer from DS but I run it on heroic a lot trying to get the purple one. I'd love that or the arch sword. I have que'dar or whatever but I really dont like how small and common it is.

[gry]

I'm pretty much easy to satisfy with transmog:

Tier6 and done - all my chars wear theirs and I'm happy with it. For Weapons I mostly use weapons from Vanilla (melee) or TBC (like my priest has Apostle of Argus http://www.wowhead.com/item=30908/apostle-of-argus)

[tankbug]

If I have a theme, for example "Scarlet Crusade", I use Mogit to go through red, white and golden pieces to match them. Shoulders are often the most visible piece on your gear, which makes it a good place to start.

Mogit is so good that you don't even know much about existing armor, just browse instant previews on your character.

[Gaidax]

Depends, sometimes I just mess with Mogit or get a vibe for some theme and try to find something for it.

Usually I start with a robe.