Natural 20/1 Crit fails and Crit successes, How do you handle them?

[1QD]

So in most of my gaming experiences, rolling a Nat 1 was bad and a natural 20 was like double Dmg or something. In my own system, nat 20's are bad, and nat 1's are good, 30's are death and 00's can cost you a limb. What are your house rules for determining the result of a really good roll?

 

[Umbran]

I run too many different systems to have a single answer to that. I don't usually house rule critical successes or failures - I just use the mechanics the system has, if any.