Sorry, I know I am kind of late to the game, but regarding season premieres my order would be:
-Fisher King Part 2
-Mayhem
-Extreme Aggressor
-Doubt
-Nameless, Faceless
-The Longest Night
-It Takes a Village
-The Silencer
-The Inspiration
Also regarding favourite seasons I would have to say season 4 (very close tie with s2 but s4 has "Omnivore"), season 2, season 1, season 3, season 5, season 9, season 7, season 6 and season 8. Season 6 is so far down the list because I had the biggest dislike for Seaver. I still can never get over her lines on "Coda" when she asked if Sammy, the 10 year old autistic child, was the unsub...? And on "Corazon" when she asked if it was blood on the bottom of the suspects shoe. Again...WHAT?!?!?! Also she was about as stiff as a board in almost every scene she ever did.
A stand out moment for me on Criminal Minds is George Foyet, more specifically, "Omnivore" which was so well written to me. It still remains as my favourite episode with "Revelations" as a very close second. "100" was such a memorable episode for me because, while I wanted The Reaper to pay for what he did to all those people, I found myself not wanting him gone just yet so that we could see more great written stories involving him and Hotch. Of course I loved how Hotch handled it. Especially The Reaper saying "I surrender" and Hotch not caring about anything that he had to say and ending it once and for all. I get chills thinking about The Reaper story line!