I went from wondering what Bush was smoking (in my “Attack Iraq?” thread from long ago), to lukewarm support for the war. Why lukewarm? Honestly, the last time the US had what I would call an airtight rationale for invading Saddam was in 1998.
OTOH, Iraq had a unique relationship with the US and the UN, thanks to Saddam. His mere presence might constitute sufficient reason for ‘regime change,’ after his atrocities and invasions. He is/was like a cross between Hitler and Stalin. Nuff said.
Once it was clear we were going to invade, I moved to just praying it would end quickly without Saddam loosing a major epidemic or nerve gas on a major city. As was mentioned, we still haven’t seen the blowback or the extent of the guerilla warfare.
OTOH, there could be some positive blowback as well.
I watch the scrolling names of the dead kids, the youngest half my age, and I feel guilty for ever allowing myself to be in favor of such a shitty way to resolve problems. Then I think of all the poor Iraqi men, or the suicide bombing woman, some forced at bayonet point to sacrifice for the dying regime. Those people will never taste any of this freedom. Last, but not least, there are all the bystanders just snuffed out in an instant. Some were journalists–finally, unintentionally–getting the “big story.”
But, I’m always aware of the millions of past and future victims of the regime that have been avenged,* or may not suffer now.
Who, really, knows whether this was worth it? Maybe Saddam eats a bad oyster and dies anyway. But, now that he is gone, would I go back and rewrite history a la ANSWER or the IAC? No. Hell, no. I would not.
We may have to go to Syria to find those WMDs. Fourth Infantry is frosty. Hooah! 
*Usually not the greatest motivation unless you are dealing with murder or torture victims–or other similarly unambiguous cases.