Those superstar teams were always (and are) full of aging stars. Shaq is out-of-shape and not driven, Payton has lost a step or two, Malone is slower and lost that quick step.. same with the Rockets team of past.
My list again and why:
Kidd <--unselfish, great passer, leader
McGrady <--talented, scorer, will take the big shot
Peja <--unselfish, deadeye from the outside, makes the inside game better by being such a skilled jumpshooter which will open up the game for:
Garnett <--good jump shooter, strong on the inside, great defender, basically all the skills you could want out of a PF and more
Jermaine O'neal <--young, driven, and skilled. picked him over Shaq because of age and attitude, also because he still has the passion to win that Shaq seems to lack these days
6th Duncan <--because I had a hard time picking Garnett over Duncan, you could use him at the 4 or 5 and is probably the most technically skilled bigman of all-time so early in his career.