Celebrity Voice Actor: Heero Yuy's Voice Actor, Mark Hildreth, is a well known T.V Actor. Unfortunately, he won't return to the role due to some reception issues.
Cross Dressing Voice: In Japan,Quatre was voiced by a woman. Pretty much averted in everywhere else expect for the Flippino dub and Taiwan dub. Also, Duo is voiced by a woman in the Taiwan dub.
Hey, It's That Voice!: The first of many Gundam dubs by The Ocean Group. The voice actors would be used in other Gundam, anime, and western cartoons. And being one of the first, this is were many fans have heard the VA's before.
There's a lot of overlap with X-Men: Evolution as well. Treize is Professor Xavier and Apocolypse, Duo is Wolverine, Trowa is Cyclops, Mariemaia is Shadowcat, Quatre is Nightcrawler, Heero is Angel, Noin is Callisto, Relena is Dr. Deborah Risman, and Milliardo is a hunter. Am I forgetting anyone?
What Could Have Been: In the original draft, episodes 27 and 28 would have been flashbacks, revealing important moments from the Gundam pilots' and Relena's pasts. Unfortunately, scheduling conflicts arose which lead to head writer Katsuyuki Sumisawa quitting the series. The episodes were turned into recap episodes, and the backstories were archived in the manga Episode Zero.
Also, the designs of the Gundams themselves. The Wing Gundam isn't supposed to have any wings at all. Also, the Gundams also follow the national stereotypes trend in G Gundam, a trait largely achieved in the designs of the Shenlong, Sandrock, and Wing, which shares a similar color scheme with the God Gundam.
One episode features what has to be one of the single most Genre Savvy mooks in the history of the franchise. This particular mook, whoom this troper seems to recall never even gets a name, comments that "Outer Space has a bad habit of sending menacing objects to Earth"...which summarizes, to some extent or another, not only Wing itself but the vast majority of Gundam series, both before and since.