Well, here are the results of the cross posted GOTY poll. The poll was put on four different message boards to try to get a varied opinion on games, since one board might have biases, and the other might not. But, in the end, the biases didn't matter, since this year was all about Metroid.
Much like last year, when GTA3 destroyed all comers, Prime made sure no other game had a chance. The scoring went: 3 points for a first place vote, 2 points for second, and 1 point for third. Metroid Prime ended up 20 points higher than second place GTA: Vice City, which then itself had a 12 point gap over third place Morrowind.
Metroid Prime - 53 points Vice City - 33 points Morrowind - 21 points Animal Crossing - 20 points Splinter Cell - 19 points Warcraft 3 - 16 points Neverwinter Nights - 12 points NCAA Football 2003 - 11 points Battlefield 1942 - 11 points Eternal Darkness - 10 points Metroid Fusion - 9 points Smackdown 4 - 9 points Tony Hawk 4 - 8 points Suikoden 3 - 7 points Tekken 4 - 5 points Freedom Force - 4 points Kingdom Hearts - 4 points Sly Cooper - 3 points DDR MAX - 3 points Stuntman - 3 points Medal of Honor: Allied Assault - 3 points Super Mario Sunshine - 3 points Gitaroo-Man - 3 points Rez - 3 points Mortal Kombat: Deadly Alliance - 3 points NHL 2k3 - 2 points Sims Vacation - 2 points Aggressive Inline - 2 points Steel Battallion - 2 points Age of Mythology - 2 points Space Channel 5: Part 2 - 2 points Timesplitters 2 - 2 points NHL 2003 - 2 points Unreal Tournament 2003 - 2 points NCAA College Basketball 2k3 - 1 point Gunvalkyrie - 1 point Super Monkey Ball 2 - 1 point Rollercoaster Tycoon 2 - 1 point Jedi Knight 2: Jedi Outcast - 1 point Rallisport Challenge - 1 point Mark of Kri - 1 point Wild Arms 3 - 1 point Command and Conquer: Renegade - 1 point Mech Assault - 1 point Silent Hill 2 - 1 point DBZ: Legendary Super Warriors - 1 point
With Nintendo products, it's more a question of continued third party support than it is any hardware difficulties. Both the N64 and the Gamecube started to be avoided by third party developers pretty quickly.