Playing ED was usually with all the dice in store. Now, when Thord Edition hit, d4's and d20's were excluded. And it works a lot, lot better.
And my favorite dice are d6's, because of the sheer re-rolling potential in ED and SW. And Edge-based SR rolls.
None superstitions here, though my dice luck seems a bit extreme sometimes. I once was to be taken in by a DnD group, but they decided they don't want me after i've rolled all 18's on 3d6 character creation... With three different dice sets. That was a once-in-a-lifetime roll, so imagine my dissapointment.
And my Earthdawn GM has too much luck with his dice, to be honest. We're jokingli refferin to him having weave an n-th level Thread in those.