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Chrono Trigger - I get lightning elemental magic
Kingdom Hearts - I can open/seal any door I want
Jak and Daxter - The Precursor's Legacy - With the power of yellow Eco, I can shoot yellow projectiles whenever I punch
Rayman 2 - I can spin my hair to slowly descend upwards or be carried upwards by air currents
Ace Attorney Trilogy - My Objections are so powerful, the evidence jumps at me to help me in my case
A Link Between Worlds - I can merge into a wall for a short period of time
Crash Bandicoot 3: Warped - I can double jump
Super Mario Galaxy 1 - I can spin in the air and ascend slightly (I can only spin once until I hit the ground again)
Cave Story - My enemies drop triangles which let me level up my weapons
Pokemon Blue - I can catch one animal/monster and call it to help me fight
Pokemon X/Y - I can roller skate (yeah, I'd be cool if I could)
Pikmin 2 - I get a whistle, with which I can control armies with ease
MySims Agents - I can fly a jet
Croc: The legend of Gobbos - I get an ability to butt stomp and yell ridiculoulsy cute things while doing so
Croc 2 - I can turn on a dime when moving (even while running!!)
Spyro the Dragon - Breathing fire is fun C:
Gothic 1 - I can perform a ridiculously large leap forwards and stand up fine
Gothic 2 - Why not, I can wield a heavy sword and armor and slay dragons with ease
Crash: Wrath of Cortex - I can walk on active explosives and not detonate them
Jazz Jackrabbit 2 - I get a million freaking guns with cool abilities
Pac Man World - I can start rolling and rapidly gain speed
Metroid Zero Mission - Wall jumping
Banjo Kazooie - My puzzle solving skills are godly
Sonic Heroes - Ability to spawn glitches at other opponents, and making them spontaneously slow down, fall through the floor and many other evil things
FEZ - I can align my vision to look perfectly North, South, East or West
Sleeping Dogs - I can jump from one vehicle to another and steal it in a span of seconds
Maldita Castilla - Patience of a saint
To the Moon - Ability to enter one's memories and 'live' them

That's about it for now.

Kirby Air Ride: Hop on a Warpstar called by my own cell phone so I can zoom around to any location, as well as glide for a good 5 seconds. :3

Tong-Nou: The power of transmigration! No more perma-death for me!
Drill Dozer: Having a ride-able robot with a big drill in which I can use to cause all sorts of destruction.
Eversion: Warping Reality.
VVVVVV: Gravity flipping!
American McGee's Grimm: The power to turn happy, cuddly places into morbid bloodbaths. (and butt-stomping)
Boson X: Speed increase, shrinking to the size of a Planck, and gaining power from flashing thingies.
Battleblock Theater/Super meat boy: Reflexes and a lot of klutzy deaths, which are dealt with by re-spawning.
RCT2/3: Roller coaster building! Wheeeee!
Various Worm games: Huge arsenal if ridiculous powerful weapons that if used right and screw over anyone who dares contest me!
GMod: 2 weapons: Phys-gun/Tool gun.
KSP: Rocket building!
Portal/2: Portal gun!
AT:TPGTI: Gel cannon!
Doom: Weapons, ammo, and violence!
Russian Overkill (Doom mod): Overpowered weapons!
Brutal Doom (See RO): Ultra Violence!
Scribblenauts: Summoning anything (that isn't any terms for use over 18)