Alright guys here's One Winged Angel (the other board I go to requested it).
http://www.filefactory.com/file/d94514/
I'll get to the ones Dant_e mentioned, but here's a list I was talking about of what I already know that you can expect to get done FAST.
Of course, feel free to request others as well, learning new ones is fun.
Aeris' Theme (VII)
Ambush Attack (IX)
Ami (VIII)
Balamb Garden (VIII)
Barett's Theme (VII)
Battle 1 (IX)
Battle With Gilgamesh (V, XII. I actually know all three versions, those being the original, the XII one, and the Shiro Hamaguchi one)
Battle with Seymour (X. Since it's fast and stuff I might smear out some parts instead of keep a beat)
Besaid Island (X)
Between Ordeals/Cloister of Trials (X)
Birth of a God (VII. For a while I was missing a few pages so the second part may not sound as good, but maybe I'm paranoid)
Black Mage Village (IX)
Breezy (VIII)
Cait Sith's Theme (VII, but I could use some practice on just one part)
The Castle (VIII. One of my favorite ones to play ever)
Chocobo XII version (XII obviously)
Cid's Theme (VII)
Cid's Theme (IX)
Clan Headquarters (XII)
Cleyra Settlement (IX)
Compression of Time (VIII)
Cosmo Canyon (VII)
Dance With the Balamb Fish (VIII)
Demise (X-2)
Don of the Slums (VII)
Don't Be Afraid (VIII)
Edgar and Sabin (VI)
Eternal Harvest (IX)
Eternity - Memory of Lightwaves (X-2)
The Extreme (VIII)
Eyes On Me (VIII)
Fairy Battle (IX. Just got it a week or two ago so I'm not as used to it now but it shouldn't be too hard)
Fiddle de Chocobo (VII. More fun to play on the Harpsichord voice but I won't do that this time)
Fighting (VII)
Find Your Way (VIII)
Fisherman's Horizon (VIII)
Fithos Lusec Wecos Vinosec (VIII)
Fog Sea (X. JUST KIDDING!)
Force Your Way (VIII)
The Forested Temple (VII)
The Forgotten Capital (XII)
Freya's Theme (IX)
Gargan Roo (IX)
Gold Saucer (VII)
Heresy (VIII. Like Residents this is an underrated track but sounds alright on piano, and if I ever become the next Piano Squall I would revolutionize it as I would with Residents)
Highwind Takes to the Skies (VII)
Hopeless Desire (X)
Infiltrating Shinra Tower (VII)
Intruders (VIII)
It's Diffficult Standing on Both Feet, Isn't It? (VII)
Jailed (VIII. Another great track like Heresy and Residents)
Jenova Absolute (VII)
Junction (VIII)
Kuja's Theme (IX)
Lablanc Has Everything (X-2)
The Landing (VIII. Another one of my favorites)
The Legendary Beast (VIII)
Liberi Fatali (VIII)
Lindblum (IX)
Lulu's Theme (X)
Lunatic Pandora (VIII)
The Magic House (VI. Still kinda working on that though)
The Man With the Machine Gun (VIII)
Martial Law (VIII)
Mi'ihen Highway (X)
Mods de Chocobo (VIII)
Moogle's Theme (IX)
Movin (VIII. Also another one of my favorite underlooked ones)
Naivety (XII)
Nalbina Fortress Town Ward (XII)
Never Look Back (VIII. This may seem too much like a bunch of noises to be on piano, but it can be done.)
The Nightmare Begins (VII)
Normal Battle (X)
Odeka ke Chocobo (VIII)
One Winged Angel (VII)
Only a Plank Between One and Perdition (VIII)
Opening - Bombing Mission (VII)
Overture (VIII)
Path of Repentance (X)
The Place I'll Return to Someday (IX)
Prelude (VII)
Premonition (VIII)
Quadmist (IX)
Qu's Marsh (IX. I actually hate this track)
Requiem (VII)
Residents (VIII)
Reunion (VII)
Rikku's Theme (X-2. NOT X, not yet at least.)
Rivals (VIII)
Rose of May (IX. AKA "Loss of Me" on various sites across the internet due to a mistranslation.)
The Royal City of Rabanastre (XII)
A Sacrifice (VIII)
The Salt Flats (VIII)
Secret Practice (XII)
A Secret Sleeping in the Dark (VII)
Seeking Power (XII. Great track.)
Seymour's Theme (X)
Shuffle Or Boogie (VIII. Both the OST and the Hamaguchi version)
Silence Before the Storm (X)
Silence and Motion (VIII)
Sleepless City Treno (IX)
Slideshow Part 1 (VIII)
Slideshow Part 2 (VIII)
Someday the Dream Will End (X)
Spinach Rag Opera (VI. Actually Working on it ATM so would need some time.)
Steiner's Stealth (IX. AKA "Reckless Steiner")
Steiner's Theme (IX)
Still More Fighting (VII)
Stolen Materia (VII)
Succession of Witches (VIII)
Tantalus Theme (IX)
Terra's Theme (VI)
Theme of the Empire (XII)
Thunder Plateau (X)
Tifa's Theme (VII)
Timber Owls (VIII)
To the Place of the Gods (XII)
To Zanarkand (X)
Truth (VIII. One of my favorites again.)
Under Bevelle (X-2)
Under Her Control (VIII)
Vamo' alla Flamenco (IX)
Vivi's Theme (IX)
Waltz For the Moon (VIII)
Weapon Raid (VII)
We Are Thieves! (IX)
Where I Belong (VIII)
The Winner (VIII's Fanfare music, the only one I bothered to do cause it's my favorite of the fanfares I've heard based on the second part of course)
Yuna's Theme (X-2, again NOT X yet.)
So... yeah, all these wouldn't be a problem. But still if there's one not on the list feel free to bring it up, there's nothing I enjoy more.
Also, other stuff I know... by ear I figured out arrangements to a few Kingdom Hearts tracks, as well as from the .hack series "Harald's Theme" as well as a few old Action-Adventure PS1 games OST like Gex, Tomba, and a couple Disney games, but I'll list them later. So feel free to request stuff from this paragraph as well before I make a list.