Choosing YUM Repositories

[Ping-Wu Zhang]

I have heard that it is not a good idea to mix YUM repositories
belonging to different "camps".  Apparently, there are two camps which
should not be commingled:

1.  The default Fedora extra + Livna
2.  Everyone else (including dag, Freshrpms, etc.)

Can someone tell me why you choose one camp over another?  I
understand this question may turn into a flame bait.  But b/c this is
a very important issue, I apologize for advance.  & I believe most of
us are mature enough to make own decisions.  Thanks.