5 Parts of a Gameplay system that made you go "Weeee"
 

The topic is pretty much self explanatory right??
I Guess that everyone here has their little "parts" of any game's gameplay that made their games worthy, right?

Those thing that if present on other games could have made it a lot better...

So here is my 5

1- The combo System of Chrono Trigger
2- The Bulding system of Front Mission 3
3- The Materia system

I find myself to go "weeeeeeee...mwuahahaha die mofos!" with Skies of Arcadia's ship battles....good times,good times:D

Judgement Ring (Shadow Hearts series)
Suikoden V's duel system

err, misread the topic

well let see

Chrono Trigger as a whole.
FF6 as a whole.
Seeing Legend of Zelda for the first time in 3D
Sora v 1000 Heartless
Sora's Final Form and Anti Form

Riding Epona for the first time in Ocarina of Time.
Tales of Symphonia Battle System.
Sora and Riku's limit in Kingdom Hearts II.
Final Form Sora in Kingdom Hearts II.
Katamari Damacy. All of it.

By the way, you only put three.

I enjoyed the Tech system in Chrono Trigger, but getting some of the later techs took for-freakin'-ever. Even with training against one of the Mu's (which is only like 20 T.P.)

As for the materia system? Meh, totally indifferent. It may have been cool and revolutionary in its day, but that day is long gone.

Web Swinging in Spiderman 2

The Skating that actually feels like skating and not WALKING in NHL 2004.

Everything in Dragon Warrior Monsters

Catching a freaking Tauros/Kangaskhan/Chansey in Pokemon

Majoras Mask as a whole.

Changing classes in Golden Sun-- you change classes both as you level up and as you change around your elemental Djinn; and each different class has its own unique selection of spells and abilities. I have a party right now with a Samurai and a Ninja. A freakin' Ninja! I tells ya, it's freakin' sweet.

Also, I think anyone's first time playing a really good Sonic game should elicit a "Whee!". I've been playing Sonic Advance 3 (which probably isn't the best there is, but it's not bad at all), and after years of playing with Mario, the speed of a Sonic game can be exhilarating.

Tales of Phantasia's Techbirds. 'Specially in the Ifreed's Treasure Hunt sidequest.

Turtles IV may not be my preferred kind of game, but sometimes, being able to fling the guy you were beating up straight into the screen is kinda fun. Same with flipping him over your character's head and smashing him into the floor.

Illusion of Gaia has an ablility for one of your playable characters (there's really only one, but he takes on different forms) where his body spins around like a top; you can achieve some insane speeds with that one when going up or down an incline.

Also, all of StarFox.

I'd love to see a Final Fantasy game with the combat system from Grandia 3. IMO, Grandia 3 has one of the funnest combat engines in RPGs. Actually, now that I think about it, it's sort of a 3-D version of the Chrono Trigger system, but the characters move faster. Also, I'd like to see more emphasis on exploration/hidden stuff, ala Skies of Arcadia or, as a ground-based game, Dragon Quest 8.

As for the FF Job System, it's okay, but I think it tends to lead to min-maxing and a lot of extra levelling that isn't necessary.