Corrupt-a-Wish

Granted. Now you keep confusing Plural with the most offensive sequence of three words you can think of. The next time you refer to Plural, you accidentally offend everyone so horribly that you are banned for life.

I wish that I was a millionaire and had a plate of piznachos.

Granted. You are now a millionaire: you possess a million yen, or about $10k. Unfortunately you don't possess them legally. You also have a plate of piznachos. Technically speaking it might be better described as a plate with a piznacho on it, due to you tripping, tilting the plate and then kneeling on the piznachos that fell on the carpet. Have fun!

I wish for something nice and for the corruption of my wish to make it nicer (in my personal view of what "nice" means).

You have a dragon! And it's comes with an instruction manual on how to tame, train and ride dragons!
Unfortunately it is currently untamed, untrained, and is locked in your room with you, and it's not in a good mood.
*Burp*

I wish coming up with D&D scenarios was easier...

Granted. You now live in a D&D fantasy land, which means you can come up with D&D scenarios just by looking at your backyard. Unfortunately nobody around wants to play D&D, because it's too everyday. Instead they're all interested in the hot new roleplaying game, Offices and Bosses.

I wish I could type faster!

Granted. You type faster but when you will want reply to someone's wish and use a dirty word by mistake and your system will crash, you'll be banned.

I wish the server ulozto.cz (which I use for downloading movies) wasn't be so SLOW! (I can't download anything and it takes four hours instead of an hour as usual)

Granted. There is some bug that allows you to download as fast as the people with premium account. However, when the keepers of the server finds about it, they make you to pay for it.
I wish I was not so lazy.

Granted; you are now motivated to do whatever you wanted/needed to do. You fail horribly at it, though, and vow to never do it again.

I wish i actually got some people participating in that collab i've been wanting to do.

Granted. The people you want to collaberate are still not collaberating. Instead some new guys collab with you. They suck at making anything though, so you quickly feel your knowledge is so superior, you would've made a better product if you weren't collaberating. Not to mention, you need to teach them the ropes.

I wish I owned a big villa with a big piece of land around it where I could do anything I wanted to do.

You do. It's in the middle of a warzone. There's a sewage processing plant to your immediate east, a nuclear power plant to the immediate west, an international airport to the south and an active volcano to the north.

I wish I had a solid idea for a novel.

Wish Granted! You are inspired with an idea for a new language that is much easier for you to create novels in. It does not always translate well to English.

Alternate Corruption:

You do. It's in the middle of a warzone. There's a sewage processing plant to your immediate east, a nuclear power plant to the immediate west, an international airport to the south and an active volcano to the north.

Alternate Corruption 2:
You can eat electronics to temporarily be much more creative than usual. Electronics are not toxic to you. Just make sure it is powered off first.

Non Corruption :
You do!

I wish to be able to stop drinking soda without caffeine withdrawal.

Granted. When you drink soda, you experience opiate withdrawal instead of caffeine withdrawal.

I wish I was in love.

You fall madly in love with a horrible woman (uh, this is me fairly certain you're a guy, but your gender in your profile is blank so I'm not 100% certain); she strings you along, toys with your emotions and generally leaves you bitter, miserable and utterly heart-broken.
But you still love her.

I wish I owned the moon.

Granted. You have to pay real estate tax.
I wish my sister's cats stopped jumping and climbing on fly-net on bathroom window.

Granted. They're now lying dead under the window.

I wish they stopped posting jobs advertisements where driving license is needed.

Granted. They stop posting such advertisements altogether, hugely increasing the number of applicants for the remaining jobs. The huge increase in job market friction drives the economy into a deep, lasting depression.

I wish I could turn into a megatherium (preferably about eight feet tall) at will, retaining my full intellect and the ability to speak. Bodily processes performed in one form would be translated, so that, for example, eating a megatherium-suited portion of tree leaves and then transforming would leave me proportionately full of something humans can digest. My clothes would transform with me, leaving the each form dressed in whatever that form was last wearing. (Broadly speaking, like D&D 3.5 Wild Shape.)

I wish I had a solid idea for a novel.

Alternative corruption:

You do. Unfortunately, it's not your idea, and it's neither good nor original. Having had ~300 pages of notes and drafts fall on your head from a window on the fifth floor, however, you can testify that it is very solid indeed.