My list
1. The Casting - Tom Welling, Erica Durance , Michael Rosenbaum , John Schneider and Annette O'Toole, John Glover, Allison Mack, Aaron Ashmore, Justin Hartley, Laura Vandervoort, Sam Wither, Callum Blue, Cassidy Freeman, Eric Johnson, Sam Jones III and even thought I'm not fond of her character Kristen Kreuk.
2. The Special Effects
3. The Superman alumni guest staring on the series - Christopher Reeves, Terence Stamp, Margot kidder, Helen Slater, Marc McClure, Dean Cain
4. James Marsters as Brainiac
5. Retelling and re-defining the timeless relationship of Lois and Clark :heart:
6. Reintroducing the Characters from the Superman Mythology, Heroes and Villains.
7. Exploring the Clark and Lex relationship with a much greater depth than it was presented in the comics.
8. The Kent family dynamic and The Luthor father and Son brawl
9. All the homages, tributes to Superman's mythology through out the ages
10. Michael Mckean as Perry White
11. The Guest stars that eventually became Big Stars
12. The Justice League , The Legion of Superheroes, and The Justice Society Of America and other DCU characters
13. All the super hot sexy female eye candy guest stars
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14. Comic book writers writing episodes Geoff Johns, Jeph Loeb, Mark Verheiden etc...
15. The easter eggs for comic book fanboys like myself
16. The memorabilia that I've collected (Books,Magazines,Cards,DVD's,CD's and t-shirt)
17. The theme song
18. And most of all the memories of watching from the pilot to the Series Finale (Through the Good times, the bad times, the worst of times and those God awful times that seemed like an eternity of torment. Yet always came back to see an episode because I was captivated .)