Inasmuch as the OP's profile includes ...
[Screw you AAdvantage!]
... I daresay s/he is not interested in advice on obtaining lifetime status on American Airlines

. Of course the thread should still include such information for others who are interested in the same proposition.
Hahah Indeed. Thats there because a bunch of miles had expired on me, I received no notice that it was going to happen, etc. etc... there was a good period when I was not doing any travel. Now things are a little different, I am willing to consider going back to AA - if the reasons are right.
As for churning cards and whatnot... how does that effect one's credit score? Negatively? No? Explain please